@import url('https://fonts.googleapis.com/css2?family=Gabriela&family=Lato:wght@300;400;700&display=swap');

* {
    box-sizing: border-box;
}

:root {
    --font-scale: 1;
    --font-base: 16px;
    --transition-speed: 0.3s;
    --border-radius: 15px;
}

/* --------------------------- Themes ------------------------------ */

/* 1. Dark Mode Sky Blue (Default) */
[data-theme="dark-sky"] {
    --bg-color: #0d1b2a;
    --card-bg: #1b263b;
    --text-color: #e0e1dd;
    --accent-color: #415a77;
    --button-bg: #778da9;
    --button-text: #0d1b2a;
    --link-color: #8ecae6;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* 2. Dark Mode Purple */
[data-theme="dark-purple"] {
    --bg-color: #1a0a2e;
    --card-bg: #2d1b4d;
    --text-color: #e9d5ff;
    --accent-color: #7c3aed;
    --button-bg: #a78bfa;
    --button-text: #1a0a2e;
    --link-color: #d8b4fe;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* 3. Dark Mode Green */
[data-theme="dark-green"] {
    --bg-color: #061a11;
    --card-bg: #0d2e1f;
    --text-color: #dcfce7;
    --accent-color: #10b981;
    --button-bg: #34d399;
    --button-text: #061a11;
    --link-color: #a7f3d0;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* 4. Dark Mode OLED */
[data-theme="dark-oled"] {
    --bg-color: #000000;
    --card-bg: #121212;
    --text-color: #ffffff;
    --accent-color: #333333;
    --button-bg: #ffffff;
    --button-text: #000000;
    --link-color: #bbbbbb;
    --shadow: 0 10px 30px rgba(255, 255, 255, 0.05);
}

/* 5. Light Mode Snow */
[data-theme="light-snow"] {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --accent-color: #64748b;
    --button-bg: #1e293b;
    --button-text: #ffffff;
    --link-color: #2563eb;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 6. Light Mode Sky Blue */
[data-theme="light-sky"] {
    --bg-color: #f0f7ff;
    --card-bg: #ffffff;
    --text-color: #003366;
    --accent-color: #0066cc;
    --button-bg: #0066cc;
    --button-text: #ffffff;
    --link-color: #004499;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 7. Light Mode Purple */
[data-theme="light-purple"] {
    --bg-color: #f5f3ff;
    --card-bg: #ffffff;
    --text-color: #4c1d95;
    --accent-color: #8b5cf6;
    --button-bg: #8b5cf6;
    --button-text: #ffffff;
    --link-color: #6d28d9;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 8. Light Mode Green */
[data-theme="light-green"] {
    --bg-color: #f0fdf4;
    --card-bg: #ffffff;
    --text-color: #064e3b;
    --accent-color: #10b981;
    --button-bg: #10b981;
    --button-text: #ffffff;
    --link-color: #047857;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* --------------------------- Global Styles ------------------------------ */

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Lato', sans-serif;
    margin: 0;
    padding: 0;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

h1,
h2,
h3 {
    font-family: 'Gabriela', serif;
}

a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: bold;
    transition: opacity var(--transition-speed);
}

a:hover {
    opacity: 0.8;
}

.main-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* --------------------------- Header & Buttons ------------------------------ */

.page-header {
    text-align: center;
    padding: 2rem 1rem;
}

.banner-img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.title-section {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.page-title {
    font-size: 2.5rem;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.intro-text {
    max-width: 800px;
    margin: 1.5rem auto;
    line-height: 1.6;
    opacity: 0.9;
    text-align: center;
}

.controls {
    display: inline-flex;
    gap: 0.75rem;
}

.control-btn {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 30px;
    font-size: 1.25rem;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.1s, box-shadow 0.1s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.control-btn:active {
    transform: translateY(4px);
}

/* --------------------------- Search Box ------------------------------ */

.search-container {
    max-width: 600px;
    width: 100%;
    margin: 0 auto 2rem;
    position: sticky;
    top: 1rem;
    z-index: 10;
    padding: 0 10px;
    /* Prevent edge touching on mobile */
}

.search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    border: 2px solid var(--accent-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1.1rem;
    box-shadow: var(--shadow);
    transition: border-color var(--transition-speed);
}

.search-input:focus {
    outline: none;
    border-color: var(--link-color);
}

/* --------------------------- Card Grid ------------------------------ */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    position: relative;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
}

.card-id {
    position: absolute;
    top: 0.5rem;
    right: 1rem;
    font-family: 'Gabriela', serif;
    font-size: 4rem;
    opacity: 0.1;
    font-weight: bold;
}

.card-title {
    font-size: 1.5rem;
    margin: 0 0 1rem;
    color: var(--link-color);
}

.card-summary {
    line-height: 1.5;
    margin: 0;
}

/* --------------------------- Modal ------------------------------ */

body.modal-open {
    overflow: hidden;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-content {
    background-color: var(--card-bg);
    color: var(--text-color);
    max-width: 800px;
    width: 95%;
    max-height: 85vh;
    overflow-y: auto;
    border-radius: var(--border-radius);
    padding: 2.5rem;
    position: relative;
    box-shadow: var(--shadow);
}

/* --------------------------- Nav Buttons ------------------------------ */

.nav-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.3);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s, transform 0.2s;
    z-index: 1010;
    backdrop-filter: blur(5px);
}

.nav-btn:hover {
    background: rgba(0, 0, 0, 0.6);
}

.nav-btn:active {
    transform: translateY(-50%) scale(0.9);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

@media (max-width: 1000px) {
    .nav-btn {
        position: absolute;
        bottom: 10px;
        top: auto;
        transform: none;
        width: 40px;
        height: 40px;
    }

    .nav-btn:active {
        transform: scale(0.9);
    }

    .prev-btn {
        left: 10px;
    }

    .next-btn {
        right: 10px;
    }
}


.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    line-height: 1;
}

.modal-title {
    font-size: 2rem;
    margin-top: 0;
    margin-bottom: 1.5rem;
    padding-right: 2rem;
    color: var(--link-color);
}

.modal-detail {
    line-height: 1.6;
}

.modal-detail blockquote {
    background-color: rgba(0, 0, 0, 0.1);
    border-left: 5px solid var(--accent-color);
    padding: 1rem;
    margin: 1rem 0;
    font-style: italic;
}

/* --------------------------- Footer ------------------------------ */

.footer {
    text-align: center;
    padding: 3rem 1rem;
    opacity: 0.7;
    font-size: 0.9rem;
}

/* --------------------------- Mobile Adjustments ------------------------------ */

@media (max-width: 600px) {
    .main-wrapper {
        padding: 0.5rem;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .modal-content {
        padding: 1.5rem;
    }

    .modal-title {
        font-size: 1.5rem;
    }
}