/* ===================================
   CSS Variables & Reset
   =================================== */

:root {
    /* Primary Colors */
    --color-primary: #1e5aa8;
    --color-primary-dark: #164785;
    --color-primary-light: #3a7bc8;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Semantic Colors */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Icon Color - Consistent across the site */
    --color-icon: #1e5aa8;

    /* Typography */
    --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --container-max: 1200px;
    --header-height: 72px;
}

/* Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul,
ol {
    list-style: none;
}

/* ===================================
   Layout
   =================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-4xl) 0;
}

.section-alt {
    background-color: var(--color-gray-50);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
}

/* ===================================
   Header
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--color-icon);
}

.logo-text {
    color: var(--color-gray-900);
}

/* Navigation */
.main-nav {
    display: none;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-gray-700);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
    background-color: var(--color-gray-100);
    color: var(--color-primary);
}

.dropdown-arrow {
    width: 12px;
    height: 12px;
    transition: transform var(--transition-fast);
}

.dropdown-toggle[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown:focus-within .dropdown-menu,
.dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dropdown-link:hover,
.dropdown-link:focus {
    background-color: var(--color-gray-100);
    color: var(--color-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.mobile-menu-toggle:hover {
    background-color: var(--color-gray-100);
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background-color: var(--color-gray-700);
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    padding-top: calc(var(--header-height) + var(--spacing-4xl));
    padding-bottom: var(--spacing-4xl);
    background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-illustration {
    width: 100%;
    max-width: 400px;
    height: auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--color-gray-50);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   Features Grid
   =================================== */

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.feature-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-icon);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--color-gray-600);
}

/* ===================================
   Steps Section
   =================================== */

.steps-list {
    max-width: 800px;
    margin: 0 auto;
    counter-reset: step;
}

.step-item {
    display: flex;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

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

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-xl);
    font-weight: 700;
    border-radius: var(--radius-full);
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--color-gray-600);
}

/* ===================================
   Info Cards
   =================================== */

.info-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.info-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
}

.info-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-icon);
}

.info-icon svg {
    width: 100%;
    height: 100%;
}

.info-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.info-description {
    color: var(--color-gray-600);
}

/* ===================================
   Data Grid
   =================================== */

.data-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.data-category {
    background-color: var(--color-gray-50);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
}

.data-category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.data-icon {
    width: 24px;
    height: 24px;
    color: var(--color-icon);
}

.data-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.data-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-600);
}

.data-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

/* ===================================
   Sources Grid
   =================================== */

.sources-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.source-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.source-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.source-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-icon);
}

.source-icon svg {
    width: 100%;
    height: 100%;
}

.source-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.source-description {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.source-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.source-feature {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-full);
}

/* ===================================
   Tips Grid
   =================================== */

.tips-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.tip-card {
    position: relative;
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    padding-top: var(--spacing-3xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
}

.tip-number {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-gray-200);
    line-height: 1;
}

.tip-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.tip-description {
    color: var(--color-gray-600);
}

/* ===================================
   FAQ Section
   =================================== */

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-lg);
    text-align: left;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--color-gray-50);
}

.faq-question span {
    flex: 1;
    padding-right: var(--spacing-md);
}

.faq-icon {
    width: 24px;
    height: 24px;
    color: var(--color-icon);
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-gray-600);
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

/* ===================================
   Contact Section
   =================================== */

.contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.contact-card {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    min-width: 250px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-icon);
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

.contact-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.contact-detail {
    color: var(--color-primary);
    font-weight: 500;
}

.contact-link {
    display: inline-block;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.disclaimer {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background-color: var(--color-gray-50);
    border-radius: var(--radius-lg);
    text-align: center;
}

.disclaimer p {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-400);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-white);
    font-weight: 700;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-icon {
    color: var(--color-primary-light);
}

.footer-description {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.footer-nav-title {
    color: var(--color-white);
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-nav-list a {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-nav-list a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
}

.copyright {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-note {
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .info-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .data-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sources-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tips-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .mobile-menu-toggle {
        display: none;
    }

    .main-nav {
        display: block;
    }

    .hero .container {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }

    .hero-content {
        text-align: left;
    }

    .hero-title {
        font-size: var(--font-size-5xl);
    }

    .hero-subtitle {
        margin-left: 0;
        margin-right: 0;
    }

    .hero-cta {
        justify-content: flex-start;
    }

    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .info-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .data-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .sources-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .tips-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 2fr;
    }

    .footer-nav {
        grid-template-columns: repeat(3, 1fr);
        justify-items: end;
    }
}

/* Large Desktop */
@media (min-width: 1280px) {
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

/* Mobile Menu Open State */
@media (max-width: 1023px) {
    .main-nav {
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-white);
        border-bottom: 1px solid var(--color-gray-200);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg);
        display: none;
    }

    .main-nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: var(--spacing-xl);
        display: none;
    }

    .dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
        display: block;
    }
}

/* Accessibility - Focus Styles */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===================================
   Video Section
   =================================== */

.video-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    max-width: 1000px;
    margin: 0 auto;
}

.video-thumbnail-link {
    display: block;
    text-decoration: none;
}

.video-thumbnail {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background-color: var(--color-gray-900);
    aspect-ratio: 16 / 9;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base), filter var(--transition-base);
}

.video-thumbnail-link:hover .video-thumbnail img {
    transform: scale(1.05);
    filter: brightness(0.8);
}

.video-play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 68px;
    height: 48px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.video-play-button svg {
    width: 100%;
    height: 100%;
}

.video-play-button .play-bg {
    transition: fill var(--transition-fast);
}

.video-thumbnail-link:hover .video-play-button {
    transform: translate(-50%, -50%) scale(1.1);
}

.video-thumbnail-link:hover .video-play-button .play-bg {
    fill: #cc0000;
}

.video-external-hint {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: rgba(0, 0, 0, 0.8);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-full);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.video-thumbnail-link:hover .video-external-hint {
    opacity: 1;
}

.video-description {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
}

.video-description h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.video-description ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.video-description li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-600);
}

.video-description li::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.video-description ul {
    margin-bottom: var(--spacing-lg);
}

.video-btn {
    display: inline-flex;
    width: 100%;
    justify-content: center;
}

.video-btn .btn-icon {
    width: 20px;
    height: 20px;
}

/* ===================================
   Data Notice
   =================================== */

.data-notice {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-200);
    border-left: 4px solid var(--color-primary);
}

.notice-icon {
    width: 24px;
    height: 24px;
    color: var(--color-icon);
    flex-shrink: 0;
}

.data-notice p {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.data-notice strong {
    color: var(--color-gray-900);
}

/* Desktop video layout */
@media (min-width: 768px) {
    .video-container {
        grid-template-columns: 2fr 1fr;
        align-items: start;
    }
}

/* Print Styles */
@media print {
    .header,
    .hero-cta,
    .footer,
    .video-container {
        display: none;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    body {
        font-size: 12pt;
    }
}