/* Global Time - Blue-Teal Theme */

/* Tool Header */
.tool-header {
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    color: white;
    padding: 2rem 0;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

.tool-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.container {
    position: relative;
    z-index: 2;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: white;
}

.breadcrumb i {
    font-size: 0.8rem;
    opacity: 0.6;
}

.breadcrumb span {
    color: white;
    font-weight: 600;
}

/* Tool Info */
.tool-info {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.tool-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
}

.tool-details h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.tool-details p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.tool-meta {
    display: flex;
    gap: 2rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    opacity: 0.9;
}

.meta-item i {
    color: #ffd700;
}
/* Main Content Layout */
.main-content {
    padding: 3rem 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    min-height: 70vh;
}

.content-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Sidebar */
.tool-sidebar {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 8px 30px rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.1);
    height: fit-content;
    position: sticky;
    top: 120px;
}

.sidebar-content h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f3f4f6;
}

.sidebar-content h3 i {
    color: #0891b2;
}

/* Global Navigation */
.global-nav {
    margin-bottom: 2rem;
}

.nav-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 12px;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 0.75rem;
    text-align: left;
}

.nav-item:hover {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-color: rgba(8, 145, 178, 0.3);
    transform: translateX(4px);
}

.nav-item.active {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    border-color: #0891b2;
    color: white;
    transform: translateX(4px);
    box-shadow: 0 4px 15px rgba(8, 145, 178, 0.3);
}

.nav-icon {
    width: 40px;
    height: 40px;
    background: rgba(8, 145, 178, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #0891b2;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.nav-item.active .nav-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.nav-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.nav-desc {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* Quick Links */
.quick-links {
    padding-top: 1.5rem;
    border-top: 2px solid #f3f4f6;
}

.quick-links h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: #6b7280;
    margin-bottom: 1rem;
}

.quick-links h4 i {
    color: #0891b2;
    font-size: 0.9rem;
}

.quick-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    color: #6b7280;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.quick-link:hover {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    color: #0891b2;
    transform: translateX(2px);
}

.quick-link i {
    width: 16px;
    color: #0891b2;
}

/* Global Main */
.global-main {
    background: white;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.1);
    overflow: hidden;
    position: relative;
}

.global-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
}

/* Global Panel */
.global-panel {
    display: none;
    padding: 3rem;
}

.global-panel.active {
    display: block;
    animation: fadeInUp 0.6s ease-out;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid #f3f4f6;
}

.panel-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
    flex-shrink: 0;
}

.panel-title h2 {
    font-size: 2rem;
    font-weight: 800;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.panel-title p {
    color: #6b7280;
    font-size: 1.1rem;
    margin: 0;
}

/* Form Styles */
.global-form {
    max-width: 100%;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.form-row.single {
    grid-template-columns: 1fr;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    color: #374151;
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.form-group label i {
    color: #0891b2;
    width: 16px;
}

.form-input {
    padding: 1rem 1.25rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: #0891b2;
    box-shadow: 0 0 0 4px rgba(8, 145, 178, 0.1);
    transform: translateY(-1px);
}

.form-input:hover {
    border-color: #d1d5db;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.quick-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    color: #0891b2;
    border: 2px solid rgba(8, 145, 178, 0.2);
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.quick-btn:hover {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    border-color: #0891b2;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(8, 145, 178, 0.3);
}

/* Convert Button */
.convert-btn,
.find-times-btn,
.check-dst-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.convert-btn:hover,
.find-times-btn:hover,
.check-dst-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(8, 145, 178, 0.4);
}

.convert-btn:active,
.find-times-btn:active,
.check-dst-btn:active {
    transform: translateY(0);
}

.convert-btn i,
.find-times-btn i,
.check-dst-btn i {
    font-size: 1.2rem;
}
/* Result Section */
.result-section {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border: 2px solid #bae6fd;
    border-radius: 16px;
    padding: 2rem;
    margin-top: 2rem;
    display: none;
}

.result-section.show {
    display: block;
    animation: slideInUp 0.6s ease-out;
}

.result-highlight {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.result-highlight .main-result {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.result-highlight .sub-result {
    font-size: 1.1rem;
    opacity: 0.9;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(8, 145, 178, 0.2);
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-weight: 600;
    color: #374151;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: #0891b2;
}

/* World Clocks */
.clock-controls {
    margin-bottom: 2rem;
}

.add-clock-form {
    display: flex;
    gap: 1rem;
    align-items: end;
}

.add-clock-form .form-input {
    flex: 1;
}

.add-clock-btn {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.add-clock-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.world-clocks-container {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    border: 2px solid #f3f4f6;
    min-height: 300px;
}

.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: #6b7280;
}

.empty-state i {
    font-size: 3rem;
    color: #d1d5db;
    margin-bottom: 1rem;
}

.empty-state p {
    font-size: 1.1rem;
    margin: 0;
}

.world-clock-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 12px;
    margin-bottom: 1rem;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.world-clock-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(8, 145, 178, 0.1);
}

.clock-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.clock-city {
    font-weight: 700;
    color: #1f2937;
    font-size: 1.1rem;
}

.clock-timezone {
    color: #6b7280;
    font-size: 0.9rem;
}

.clock-time {
    font-size: 1.8rem;
    font-weight: 800;
    color: #0891b2;
}

.clock-date {
    font-size: 0.9rem;
    color: #6b7280;
}

.remove-clock-btn {
    width: 32px;
    height: 32px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-clock-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

/* Meeting Planner */
.meeting-setup,
.participants-section {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 2rem;
    border: 1px solid #e5e7eb;
}

.meeting-setup h4,
.participants-section h4 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: #374151;
    margin-bottom: 1.5rem;
}

.meeting-setup h4 i,
.participants-section h4 i {
    color: #0891b2;
}

.participant-input {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.participant-input .form-input {
    flex: 1;
}

.add-participant-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.add-participant-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.participants-list {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid #e5e7eb;
    min-height: 150px;
}

.participant-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    border: 1px solid #e5e7eb;
}

.participant-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.participant-timezone {
    font-weight: 600;
    color: #1f2937;
}

.participant-time {
    color: #6b7280;
    font-size: 0.9rem;
}

.remove-participant-btn {
    width: 28px;
    height: 28px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.remove-participant-btn:hover {
    transform: scale(1.1);
}

/* Meeting Times Results */
.meeting-times-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.meeting-time-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    border: 2px solid #e5e7eb;
    transition: all 0.3s ease;
}

.meeting-time-card.optimal {
    border-color: #10b981;
    background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
}

.meeting-time-card.good {
    border-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
}

.meeting-time-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(8, 145, 178, 0.1);
}

.meeting-time-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.meeting-time {
    font-size: 1.3rem;
    font-weight: 700;
    color: #1f2937;
}

.meeting-score {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.meeting-score.optimal {
    background: #10b981;
    color: white;
}

.meeting-score.good {
    background: #f59e0b;
    color: white;
}

.meeting-score.fair {
    background: #6b7280;
    color: white;
}

.participant-times {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.participant-time-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.participant-name {
    color: #6b7280;
}

.participant-local-time {
    font-weight: 600;
    color: #1f2937;
}

/* DST Information */
.dst-info-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    border: 2px solid #e5e7eb;
    margin-top: 1.5rem;
}

.dst-status {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.dst-indicator {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.dst-indicator.active {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.dst-indicator.inactive {
    background: linear-gradient(135deg, #6b7280, #4b5563);
}

.dst-details h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.dst-details p {
    color: #6b7280;
    margin: 0;
}

.dst-transitions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.dst-transition {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.transition-type {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.transition-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.transition-icon.spring {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.transition-icon.fall {
    background: linear-gradient(135deg, #6b7280, #4b5563);
}

.transition-title {
    font-weight: 700;
    color: #1f2937;
}

.transition-date {
    font-size: 1.1rem;
    font-weight: 600;
    color: #0891b2;
    margin-bottom: 0.5rem;
}

.transition-description {
    color: #6b7280;
    font-size: 0.9rem;
    margin: 0;
}
/* Content Sections */
.info-section,
.usage-section,
.calculation-section,
.use-cases-section,
.faq-section {
    padding: 5rem 0;
    position: relative;
}

.info-section {
    background: white;
}

.usage-section {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.calculation-section {
    background: white;
}

.use-cases-section {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.faq-section {
    background: white;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1f2937;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.2rem;
    color: #6b7280;
    line-height: 1.6;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.info-card {
    background: white;
    padding: 1.5rem 1rem;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
}

.info-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(8, 145, 178, 0.2);
}

.info-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.info-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1rem;
}

.info-card p {
    color: #6b7280;
    line-height: 1.6;
    font-size: 1rem;
}

/* Steps Flow Design */
.steps-flow {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 4rem;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.step-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.step-item:last-child {
    margin-bottom: 2rem;
}

.step-visual {
    flex-shrink: 0;
    position: relative;
    z-index: 2;
}

.step-circle {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    position: relative;
    box-shadow: 0 10px 30px rgba(8, 145, 178, 0.3);
    transition: all 0.3s ease;
}

.step-item:hover .step-circle {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(8, 145, 178, 0.4);
}

.step-number {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
}

.step-icon {
    font-size: 2.5rem;
    margin-top: 1rem;
}

.step-content {
    flex: 1;
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.1);
    position: relative;
    transition: all 0.3s ease;
}

.step-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    border-radius: 20px 20px 0 0;
}

.step-item:hover .step-content {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(8, 145, 178, 0.15);
}

.step-content h3 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #1f2937;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.step-content p {
    color: #6b7280;
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* Step Options */
.step-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.option-tag {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    color: #0891b2;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid rgba(8, 145, 178, 0.2);
    transition: all 0.3s ease;
}

.option-tag:hover {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    transform: translateY(-2px);
}

/* Step Details */
.step-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.detail-item:hover {
    transform: translateX(5px);
    border-color: rgba(8, 145, 178, 0.3);
    box-shadow: 0 4px 15px rgba(8, 145, 178, 0.1);
}

.detail-item i {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.detail-item span {
    color: #374151;
    font-weight: 500;
    font-size: 1rem;
}

/* Step Features */
.step-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    transition: all 0.3s ease;
}

.feature-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

.feature-badge i {
    font-size: 1rem;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: white;
    color: #0891b2;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    border: 2px solid rgba(8, 145, 178, 0.2);
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.action-btn:hover {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    border-color: #0891b2;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.action-btn i {
    font-size: 1.1rem;
}

/* Step Arrows */
.step-arrow {
    position: absolute;
    left: 60px;
    bottom: -2rem;
    transform: translateX(-50%);
    z-index: 1;
}

.step-arrow i {
    font-size: 2rem;
    color: #0891b2;
    opacity: 0.6;
    animation: bounce 2s ease-in-out infinite;
}

.step-item:last-child .step-arrow {
    display: none;
}

/* Quick Tips */
.quick-tips {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid #e5e7eb;
    margin-top: 3rem;
}

.tips-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.tips-header i {
    color: #f59e0b;
    font-size: 1.5rem;
}

.tips-header h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    margin: 0;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tip-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.1);
    transition: all 0.3s ease;
}

.tip-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.15);
}

.tip-item i {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.tip-item span {
    color: #374151;
    font-weight: 500;
    line-height: 1.5;
}

/* Animations */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-10px) translateX(-50%);
    }
    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* Calculation Showcase */
.calculation-showcase {
    max-width: 1200px;
    margin: 0 auto;
}

.calculation-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.calc-tab {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: white;
    border: 2px solid rgba(8, 145, 178, 0.2);
    border-radius: 50px;
    color: #6b7280;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.calc-tab:hover {
    border-color: #0891b2;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.2);
}

.calc-tab.active {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    border-color: #0891b2;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.calc-tab i {
    font-size: 1.2rem;
}

.calculation-content {
    position: relative;
}

.calc-panel {
    display: none;
    background: white;
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 10px 40px rgba(8, 145, 178, 0.15);
    border: 1px solid rgba(8, 145, 178, 0.1);
    position: relative;
    overflow: hidden;
}

.calc-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
}

.calc-panel.active {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    animation: fadeInUp 0.6s ease-out;
}

.calc-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.visual-diagram {
    width: 100%;
    max-width: 400px;
}

/* Time Zone Flow Visual */
.timezone-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.timezone-point {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.timezone-marker {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.timezone-marker.source {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
}

.timezone-marker.target {
    background: linear-gradient(135deg, #10b981, #059669);
}

.timezone-point span {
    font-weight: 600;
    color: #374151;
    font-size: 0.9rem;
    text-align: center;
}

.conversion-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: #0891b2;
}

.conversion-arrow i {
    font-size: 2rem;
    font-weight: 700;
}

.conversion-arrow span {
    font-size: 0.8rem;
    font-weight: 600;
}

/* DST Timeline Visual */
.dst-timeline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.dst-event {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.dst-marker {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.dst-event.spring .dst-marker {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.dst-event.fall .dst-marker {
    background: linear-gradient(135deg, #6b7280, #4b5563);
}

.dst-event span {
    font-weight: 600;
    color: #374151;
    font-size: 0.9rem;
    text-align: center;
}

.dst-line {
    flex: 1;
    height: 4px;
    background: linear-gradient(90deg, #f59e0b, #6b7280);
    border-radius: 2px;
    position: relative;
}

/* Meeting Optimization Visual */
.meeting-optimization {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.participant-zones {
    display: flex;
    gap: 1rem;
}

.zone-block {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(8, 145, 178, 0.3);
}

.optimization-arrow {
    font-size: 2rem;
    color: #0891b2;
    font-weight: 700;
}

.optimal-time {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 1.5rem 2rem;
    border-radius: 16px;
    font-weight: 600;
    font-size: 1.2rem;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.optimal-time i {
    font-size: 1.5rem;
}

/* Calculation Details */
.calc-details h3 {
    font-size: 2rem;
    font-weight: 800;
    color: #1f2937;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 16px;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(5px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.1);
    border-color: rgba(8, 145, 178, 0.3);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(8, 145, 178, 0.3);
}

.feature-text h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.feature-text p {
    color: #6b7280;
    line-height: 1.5;
    margin: 0;
    font-size: 0.95rem;
}

/* Use Cases Grid */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.use-case-category {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.use-case-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
}

.use-case-category:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(8, 145, 178, 0.15);
}

.use-case-category h3 {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.4rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1.5rem;
}

.use-case-category h3 i {
    color: #0891b2;
    font-size: 1.2rem;
}

.use-case-category ul {
    list-style: none;
    padding: 0;
}

.use-case-category li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: #6b7280;
    line-height: 1.5;
}

.use-case-category li::before {
    content: '•';
    color: #0891b2;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 16px;
    margin-bottom: 1rem;
    box-shadow: 0 4px 20px rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 8px 30px rgba(8, 145, 178, 0.15);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    cursor: pointer;
    font-weight: 600;
    color: #1f2937;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    background: white;
}

.faq-question:hover {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
}

.faq-item.active .faq-question {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
}

.faq-question i {
    transition: transform 0.3s ease;
    color: #0891b2;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: white;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer-content {
    padding: 0 2rem 2rem;
    color: #6b7280;
    line-height: 1.6;
    font-size: 1rem;
}

/* Form Validation Styles */
.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.5rem;
    display: none;
    align-items: center;
    gap: 0.5rem;
    animation: slideInError 0.3s ease-out;
}

.error-message.show {
    display: flex;
}

.error-message::before {
    content: '⚠';
    font-size: 1rem;
    color: #ef4444;
}

.form-input.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
    background-color: #fef2f2;
}

.form-input.success {
    border-color: #10b981;
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.form-input.error:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2);
}

/* Loading state for buttons */
.convert-btn.loading,
.find-times-btn.loading,
.check-dst-btn.loading {
    opacity: 0.7;
    cursor: not-allowed;
    position: relative;
}

.convert-btn.loading::after,
.find-times-btn.loading::after,
.check-dst-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    margin: auto;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.convert-btn.loading span,
.convert-btn.loading i,
.find-times-btn.loading span,
.find-times-btn.loading i,
.check-dst-btn.loading span,
.check-dst-btn.loading i {
    opacity: 0;
}

/* Copy Button */
.copy-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
    font-size: 0.95rem;
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.copy-btn:active {
    transform: translateY(0);
}

/* Animations */
@keyframes slideInError {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}
/* Mobile Responsive */
@media (max-width: 1024px) {
    .content-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .tool-sidebar {
        position: static;
        order: 2;
    }
    
    .global-main {
        order: 1;
    }
    
    .tool-info {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .tool-meta {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .tool-header {
        padding: 1.5rem 0;
    }
    
    .tool-details h1 {
        font-size: 2rem;
    }
    
    .tool-details p {
        font-size: 1.1rem;
    }
    
    .tool-meta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-content {
        padding: 2rem 0;
    }
    
    .content-layout {
        gap: 1.5rem;
    }
    
    .tool-sidebar {
        padding: 1.5rem;
    }
    
    .global-panel {
        padding: 2rem;
    }
    
    .panel-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .panel-title h2 {
        font-size: 1.8rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .quick-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .quick-btn {
        justify-content: center;
    }
    
    .add-clock-form {
        flex-direction: column;
        gap: 1rem;
    }
    
    .add-clock-btn {
        width: 100%;
        height: 50px;
    }
    
    .participant-input {
        flex-direction: column;
        gap: 1rem;
    }
    
    .add-participant-btn {
        justify-content: center;
    }
    
    .meeting-times-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .dst-transitions {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .calc-panel.active {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
    }
    
    .calc-visual {
        order: 2;
        padding: 1rem;
    }
    
    .calc-details {
        order: 1;
    }
    
    .calc-details h3 {
        font-size: 1.6rem;
        text-align: center;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        padding: 1.25rem;
    }
    
    .feature-icon {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
    
    .timezone-flow {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .conversion-arrow {
        transform: rotate(90deg);
    }
    
    .dst-timeline {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .dst-line {
        width: 4px;
        height: 80px;
        background: linear-gradient(180deg, #f59e0b, #6b7280);
    }
    
    .participant-zones {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .zone-block {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .tool-header {
        padding: 1rem 0;
    }
    
    .tool-details h1 {
        font-size: 1.8rem;
    }
    
    .breadcrumb {
        font-size: 0.8rem;
        margin-bottom: 1.5rem;
    }
    
    .global-panel {
        padding: 1.5rem;
        margin: 0 1rem;
    }
    
    .tool-sidebar {
        padding: 1.25rem;
        margin: 0 1rem;
    }
    
    .nav-item {
        padding: 0.75rem;
        gap: 0.75rem;
    }
    
    .nav-icon {
        width: 35px;
        height: 35px;
        font-size: 1.1rem;
    }
    
    .nav-title {
        font-size: 0.9rem;
    }
    
    .nav-desc {
        font-size: 0.75rem;
    }
    
    .convert-btn,
    .find-times-btn,
    .check-dst-btn {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
    
    .result-section {
        padding: 1.5rem;
    }
    
    .result-highlight {
        padding: 1.5rem;
    }
    
    .result-highlight .main-result {
        font-size: 1.8rem;
    }
    
    .world-clock-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
        padding: 1.25rem;
    }
    
    .clock-time {
        font-size: 1.5rem;
    }
    
    .meeting-time-card {
        padding: 1.25rem;
    }
    
    .meeting-time-header {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }
    
    .participant-times {
        gap: 0.75rem;
    }
    
    .participant-time-item {
        flex-direction: column;
        text-align: center;
        gap: 0.25rem;
    }
    
    .dst-info-card {
        padding: 1.5rem;
    }
    
    .dst-status {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .dst-indicator {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
    
    .step-circle {
        width: 80px;
        height: 80px;
    }
    
    .step-number {
        font-size: 1.1rem;
        top: 10px;
    }
    
    .step-icon {
        font-size: 1.8rem;
        margin-top: 0.5rem;
    }
    
    .step-content {
        padding: 1.5rem;
    }
    
    .step-content h3 {
        font-size: 1.3rem;
    }
    
    .option-tag {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .detail-item {
        padding: 0.6rem;
        font-size: 0.9rem;
    }
    
    .feature-badge {
        padding: 0.5rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .action-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
    
    .quick-tips {
        padding: 1.5rem;
    }
    
    .tips-header h4 {
        font-size: 1.3rem;
    }
    
    .tip-item {
        padding: 1rem;
        font-size: 0.9rem;
    }
    
    .info-section,
    .usage-section,
    .calculation-section,
    .use-cases-section,
    .faq-section {
        padding: 3rem 0;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .info-card,
    .use-case-category {
        padding: 1.5rem;
    }
    
    .calc-panel.active {
        padding: 1.5rem;
    }
    
    .calc-details h3 {
        font-size: 1.4rem;
    }
    
    .feature-item {
        padding: 1rem;
    }
    
    .faq-question {
        padding: 1rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .faq-answer-content {
        padding: 0 1.25rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .calculation-tabs {
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 2rem;
    }
    
    .calc-tab {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .step-item {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
        margin-bottom: 3rem;
    }
    
    .step-arrow {
        left: 50%;
        bottom: -1.5rem;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }
    
    .use-case-category h3 {
        font-size: 1.2rem;
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .faq-container {
        padding: 0 1rem;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .tool-sidebar,
    .global-main {
        background: #1f2937;
        border-color: rgba(8, 145, 178, 0.3);
    }
    
    .panel-title h2 {
        color: white;
    }
    
    .panel-title p {
        color: #d1d5db;
    }
    
    .form-group label {
        color: #f3f4f6;
    }
    
    .form-input {
        background: #374151;
        border-color: #4b5563;
        color: white;
    }
    
    .form-input:focus {
        border-color: #0891b2;
    }
    
    .meeting-setup,
    .participants-section {
        background: linear-gradient(135deg, #374151, #4b5563);
        border-color: #6b7280;
    }
    
    .meeting-setup h4,
    .participants-section h4 {
        color: #f3f4f6;
    }
    
    .result-section {
        background: linear-gradient(135deg, #1e3a8a, #1e40af);
        border-color: #3b82f6;
    }
    
    .result-label {
        color: #f3f4f6;
    }
    
    .nav-item {
        color: #d1d5db;
    }
    
    .nav-item:hover {
        background: linear-gradient(135deg, #374151, #4b5563);
    }
    
    .sidebar-content h3 {
        color: #f3f4f6;
    }
    
    .quick-link {
        color: #d1d5db;
    }
    
    .quick-link:hover {
        background: linear-gradient(135deg, #374151, #4b5563);
        color: #0891b2;
    }
    
    .world-clocks-container,
    .participants-list,
    .dst-info-card {
        background: #374151;
        border-color: #6b7280;
    }
    
    .world-clock-item,
    .participant-item,
    .dst-transition {
        background: linear-gradient(135deg, #4b5563, #6b7280);
        border-color: #6b7280;
    }
    
    .clock-city,
    .participant-timezone {
        color: #f3f4f6;
    }
    
    .clock-timezone,
    .clock-date,
    .participant-time {
        color: #d1d5db;
    }
    
    .dst-details h4 {
        color: #f3f4f6;
    }
    
    .dst-details p {
        color: #d1d5db;
    }
    
    .transition-title {
        color: #f3f4f6;
    }
    
    .transition-description {
        color: #d1d5db;
    }
}