/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    /* Colors - Panda & Bamboo Theme */
    --color-black: #1a1a1a;
    --color-white: #ffffff;
    --color-bamboo-dark: #2d5016;
    --color-bamboo: #4a7c2c;
    --color-bamboo-light: #6fa83d;
    --color-bamboo-pale: #a8d084;
    --color-bg-light: #f5f9f3;
    --color-bg-gradient-1: #e8f5e0;
    --color-bg-gradient-2: #d4ecc5;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #6fa83d 0%, #4a7c2c 50%, #2d5016 100%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));

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

    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --font-size-lg: 1.25rem;
    --font-size-xl: 2rem;
    --font-size-xxl: 3.5rem;

    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --border-radius: 20px;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-black);
    background: var(--color-bg-light);
    overflow-x: hidden;
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: var(--spacing-md);
}

.bamboo-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(90deg, transparent, transparent 50px, rgba(255, 255, 255, 0.03) 50px, rgba(255, 255, 255, 0.03) 100px),
        repeating-linear-gradient(0deg, transparent, transparent 50px, rgba(255, 255, 255, 0.03) 50px, rgba(255, 255, 255, 0.03) 100px);
    animation: bambooMove 20s linear infinite;
}

@keyframes bambooMove {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(100px, 100px);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
}

.hero-title {
    font-size: var(--font-size-xxl);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.panda-emoji {
    font-size: 4rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

.title-text {
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.panda-illustration {
    margin: var(--spacing-lg) auto;
    width: 200px;
    height: 200px;
}

.panda-svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-15px) rotate(5deg);
    }
}

.cta-button {
    background: var(--color-white);
    color: var(--color-bamboo-dark);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-white);
    opacity: 0.8;
    animation: fadeInOut 2s ease-in-out infinite;
}

@keyframes fadeInOut {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 1;
    }
}

.arrow-down {
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 15px solid var(--color-white);
    animation: arrowBounce 1.5s ease-in-out infinite;
}

@keyframes arrowBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(10px);
    }
}

/* ===== FACTS SECTION ===== */
.facts-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background: linear-gradient(180deg, var(--color-bg-gradient-1), var(--color-bg-gradient-2));
}

.section-title {
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-bamboo-dark);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title::after {
    content: '🎋';
    display: block;
    font-size: 2rem;
    margin-top: var(--spacing-xs);
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.fact-card {
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all 0.4s ease;
    border: 2px solid rgba(255, 255, 255, 0.5);
    opacity: 0;
    transform: translateY(30px);
}

.fact-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.fact-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-bamboo-light);
}

.fact-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    animation: rotate 3s ease-in-out infinite;
}

@keyframes rotate {

    0%,
    100% {
        transform: rotate(0deg);
    }

    25% {
        transform: rotate(-10deg);
    }

    75% {
        transform: rotate(10deg);
    }
}

.fact-card h3 {
    color: var(--color-bamboo-dark);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.fact-card p {
    color: var(--color-black);
    line-height: 1.7;
}

/* ===== GALLERY SECTION ===== */
.gallery-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.gallery-item {
    text-align: center;
}

.panda-scene {
    background: var(--gradient-glass);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 2px solid var(--color-bamboo-pale);
    transition: all 0.3s ease;
    overflow: hidden;
}

.panda-scene::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(111, 168, 61, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
}

.panda-scene:hover {
    transform: scale(1.05);
    border-color: var(--color-bamboo);
}

.panda-emoji-large {
    font-size: 5rem;
    animation: wiggle 2s ease-in-out infinite;
}

.panda-emoji-medium {
    font-size: 3.5rem;
    animation: climb 3s ease-in-out infinite;
}

.panda-emoji-small {
    font-size: 2.5rem;
    position: absolute;
    animation: playJump 2s ease-in-out infinite;
}

@keyframes wiggle {

    0%,
    100% {
        transform: rotate(0deg);
    }

    25% {
        transform: rotate(-5deg);
    }

    75% {
        transform: rotate(5deg);
    }
}

@keyframes climb {

    0%,
    100% {
        transform: translateY(20px);
    }

    50% {
        transform: translateY(-20px);
    }
}

@keyframes playJump {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    50% {
        transform: translate(20px, -20px) rotate(15deg);
    }
}

.bamboo,
.zzz,
.tree {
    font-size: 2.5rem;
    position: absolute;
}

.bamboo {
    right: 20px;
    animation: sway 2s ease-in-out infinite;
}

@keyframes sway {

    0%,
    100% {
        transform: rotate(0deg);
    }

    50% {
        transform: rotate(10deg);
    }
}

.zzz {
    top: 20px;
    right: 20px;
    animation: floatUp 2s ease-in-out infinite;
}

@keyframes floatUp {
    0% {
        transform: translateY(0);
        opacity: 1;
    }

    100% {
        transform: translateY(-30px);
        opacity: 0;
    }
}

.sleeping-panda {
    transform: rotate(90deg);
}

.tree {
    left: 20px;
}

.gallery-caption {
    margin-top: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-bamboo-dark);
    font-size: 1.1rem;
}

/* ===== INTERACTIVE SECTION ===== */
.interactive-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background: linear-gradient(180deg, var(--color-white), var(--color-bg-gradient-1));
}

.reveal-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.reveal-button {
    background: var(--gradient-hero);
    color: var(--color-white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.reveal-button:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.random-fact {
    margin-top: var(--spacing-md);
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--color-bamboo-light);
    font-size: 1.2rem;
    line-height: 1.8;
    transition: all 0.5s ease;
}

.random-fact.hidden {
    opacity: 0;
    transform: scale(0.8);
    max-height: 0;
    padding: 0;
    margin: 0;
}

/* ===== CONSERVATION SECTION ===== */
.conservation-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--gradient-hero);
    color: var(--color-white);
}

.conservation-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.conservation-text {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    opacity: 0.95;
}

.conservation-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.stat:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-bamboo-dark);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-md);
}

.footer p {
    margin: var(--spacing-xs) 0;
}

.footer-small {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    :root {
        --font-size-xxl: 2.5rem;
        --font-size-xl: 1.75rem;
        --spacing-xl: 3rem;
    }

    .hero-title {
        flex-direction: column;
    }

    .facts-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .bamboo,
    .zzz,
    .tree {
        font-size: 2.5rem;
        position: absolute;
    }

    .bamboo {
        right: 20px;
        animation: sway 2s ease-in-out infinite;
    }

    @keyframes sway {

        0%,
        100% {
            transform: rotate(0deg);
        }

        50% {
            transform: rotate(10deg);
        }
    }

    .zzz {
        top: 20px;
        right: 20px;
        animation: floatUp 2s ease-in-out infinite;
    }

    @keyframes floatUp {
        0% {
            transform: translateY(0);
            opacity: 1;
        }

        100% {
            transform: translateY(-30px);
            opacity: 0;
        }
    }

    .sleeping-panda {
        transform: rotate(90deg);
    }

    .tree {
        left: 20px;
    }

    .gallery-caption {
        margin-top: var(--spacing-sm);
        font-weight: 600;
        color: var(--color-bamboo-dark);
        font-size: 1.1rem;
    }

    /* ===== INTERACTIVE SECTION ===== */
    .interactive-section {
        padding: var(--spacing-xl) var(--spacing-md);
        background: linear-gradient(180deg, var(--color-white), var(--color-bg-gradient-1));
    }

    .reveal-container {
        max-width: 600px;
        margin: 0 auto;
        text-align: center;
    }

    .reveal-button {
        background: var(--gradient-hero);
        color: var(--color-white);
        border: none;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-lg);
        font-weight: 700;
        border-radius: 50px;
        cursor: pointer;
        box-shadow: var(--shadow-md);
        transition: all 0.3s ease;
    }

    .reveal-button:hover {
        transform: scale(1.1);
        box-shadow: var(--shadow-lg);
    }

    .random-fact {
        margin-top: var(--spacing-md);
        background: var(--gradient-card);
        backdrop-filter: blur(10px);
        border-radius: var(--border-radius);
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        border: 2px solid var(--color-bamboo-light);
        font-size: 1.2rem;
        line-height: 1.8;
        transition: all 0.5s ease;
    }

    .random-fact.hidden {
        opacity: 0;
        transform: scale(0.8);
        max-height: 0;
        padding: 0;
        margin: 0;
    }

    /* ===== CONSERVATION SECTION ===== */
    .conservation-section {
        padding: var(--spacing-xl) var(--spacing-md);
        background: var(--gradient-hero);
        color: var(--color-white);
    }

    .conservation-content {
        max-width: 900px;
        margin: 0 auto;
        text-align: center;
    }

    .conservation-text {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-lg);
        line-height: 1.8;
        opacity: 0.95;
    }

    .conservation-stats {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
        margin-top: var(--spacing-lg);
    }

    .stat {
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(10px);
        border-radius: var(--border-radius);
        padding: var(--spacing-md);
        border: 2px solid rgba(255, 255, 255, 0.2);
        transition: all 0.3s ease;
    }

    .stat:hover {
        transform: translateY(-5px);
        background: rgba(255, 255, 255, 0.15);
        border-color: rgba(255, 255, 255, 0.4);
    }

    .stat-number {
        font-size: 3rem;
        font-weight: 800;
        margin-bottom: var(--spacing-xs);
    }

    .stat-label {
        font-size: 1.1rem;
        opacity: 0.9;
    }

    /* ===== FOOTER ===== */
    .footer {
        background: var(--color-bamboo-dark);
        color: var(--color-white);
        text-align: center;
        padding: var(--spacing-md);
    }

    .footer p {
        margin: var(--spacing-xs) 0;
    }

    .footer-small {
        font-size: 0.9rem;
        opacity: 0.8;
    }

    /* ===== RESPONSIVE DESIGN ===== */
    @media (max-width: 768px) {
        :root {
            --font-size-xxl: 2.5rem;
            --font-size-xl: 1.75rem;
            --spacing-xl: 3rem;
        }

        .hero-title {
            flex-direction: column;
        }

        .facts-grid,
        .gallery-grid {
            grid-template-columns: 1fr;
        }

        .conservation-stats {
            grid-template-columns: 1fr;
        }
    }

    /* ===== UTILITY CLASSES ===== */
    .hidden {
        display: none;
    }

    /* ===== FACT LINKS ===== */
    .fact-link {
        text-decoration: none;
        color: inherit;
        display: block;
        cursor: pointer;
    }

    .fact-link .fact-card {
        cursor: pointer;
    }

    .fact-link:hover .fact-card {
        transform: translateY(-10px) scale(1.02);
        box-shadow: var(--shadow-lg);
        border-color: var(--color-bamboo);
    }

    .fact-link .fact-card.revealed:hover {
        transform: translateY(-15px) scale(1.05);
    }

/* ===== FACT LINKS ===== */
.fact-link {
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}

.fact-link .fact-card {
    cursor: pointer;
}

.fact-link:hover .fact-card {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-bamboo);
}

.fact-link .fact-card.revealed:hover {
    transform: translateY(-15px) scale(1.05);
}