/* --- Global Variables --- */
:root {
    --bg-dark: #0f0f23;
    --bg-gradient: linear-gradient(135deg, #0f0f23 0%, #1a1a3a 100%);
    --card-dark: #1e1e3f;
    --card-gradient: linear-gradient(145deg, #1e1e3f, #2a2a5a);
    --text-light: #f0f0f0;
    --text-subtle: #b0b0c4;
    --accent-color: #ff6b9d;
    --accent-secondary: #4ecdc4;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --glow-color: rgba(255, 107, 157, 0.3);
    --border-radius: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-light);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

body.with-player {
    padding-bottom: 90px;
}

/* --- Enhanced Background Animation --- */
#background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 107, 157, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(78, 205, 196, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(138, 43, 226, 0.1) 0%, transparent 50%);
}

.bg-particle {
    position: absolute;
    color: rgba(255, 255, 255, 0.08);
    animation: float-around 25s infinite linear;
    bottom: -150px;
    user-select: none;
    will-change: transform;
    filter: blur(0.5px);
}

@keyframes float-around {
    0% { transform: translateY(0) translateX(-10vw) rotate(0deg) scale(0.8); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-120vh) translateX(10vw) rotate(360deg) scale(1.2); opacity: 0; }
}

/* --- Enhanced Confetti --- */
.confetti {
    position: fixed;
    width: 12px;
    height: 12px;
    top: -20px;
    opacity: 0;
    animation: fall 6s linear forwards;
    z-index: 102;
    border-radius: 2px;
}

@keyframes fall {
    0% { opacity: 1; transform: translateY(0) rotate(0deg) scale(1); }
    100% { opacity: 0; transform: translateY(100vh) rotate(720deg) scale(0.3); }
}

/* --- Enhanced Welcome Screen --- */
#welcome-screen {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100vh;
    display: flex; justify-content: center; align-items: center;
    text-align: center; padding: 2rem;
    background: var(--bg-gradient); z-index: 100;
    transition: var(--transition); backdrop-filter: blur(10px);
}

.welcome-content {
    background: var(--card-gradient);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 60px var(--shadow-color), 0 0 0 1px rgba(255, 255, 255, 0.1);
    max-width: 480px; width: 100%;
    backdrop-filter: blur(20px); border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative; overflow: hidden;
}

.welcome-content::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.welcome-content h2 {
    font-size: 2rem; margin-bottom: 1.5rem;
    color: var(--text-light); font-weight: 300; letter-spacing: -0.02em;
}

/* --- Enhanced Slider --- */
.slider-container { margin: 2rem 0; }

#year-display {
    font-size: 4rem; font-weight: 700;
    color: var(--accent-color); margin-bottom: 1.5rem;
    text-shadow: 0 0 20px var(--glow-color); transition: var(--transition);
}

.slider {
    -webkit-appearance: none; appearance: none;
    width: 100%; height: 6px;
    background: linear-gradient(90deg, #334155, #475569);
    border-radius: 3px; outline: none; transition: var(--transition);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 24px; height: 24px;
    background: var(--accent-color); cursor: pointer;
    border-radius: 50%; box-shadow: 0 0 10px var(--glow-color);
    transition: var(--transition);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 20px var(--glow-color);
}

/* --- Enhanced Theme Picker --- */
.color-picker-container { margin-bottom: 2rem; }

.color-picker-container label {
    display: block; margin-bottom: 1rem;
    color: var(--text-subtle); font-weight: 400;
}

.theme-options-container {
    display: flex; justify-content: center;
    gap: 20px; flex-wrap: wrap;
}

.theme-option {
    width: 40px; height: 40px;
    border-radius: 50%; cursor: pointer;
    border: 3px solid transparent; transition: var(--transition);
    position: relative; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.theme-option::before {
    content: ''; position: absolute; inset: -3px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, var(--accent-color), var(--accent-secondary), var(--accent-color));
    opacity: 0; transition: var(--transition);
}

.theme-option:hover { transform: scale(1.15); }

.theme-option.selected {
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.theme-option.selected::before { opacity: 1; }

/* --- Lottie Gift Container --- */
#lottie-gift-container {
    margin: 1rem auto;
    display: flex;
    justify-content: center;
    transition: all 0.3s ease-out;
}

#lottie-gift-container:hover {
    transform: scale(1.05);
}

.gift-instruction {
    color: var(--text-subtle);
    margin-top: 0.5rem;
    font-size: 0.95rem;
    animation: pulse-text 2s infinite;
}

@keyframes pulse-text {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}


/* --- Enhanced Main Content --- */
#main-content {
    opacity: 0;
    animation: fadeInMain 1.5s ease-in forwards;
}

@keyframes fadeInMain {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

main {
    max-width: 900px; margin: 0 auto;
    padding: 2rem 1.5rem 8rem;
    display: flex; flex-direction: column; gap: 5rem;
}

.section-title {
    font-family: 'Pacifico', cursive; font-size: 3rem; margin-bottom: 2.5rem;
    color: var(--accent-color); text-align: center; font-weight: 400;
    text-shadow: 0 0 30px var(--glow-color); position: relative;
}

.section-title::after {
    content: ''; position: absolute; bottom: -10px; left: 50%;
    transform: translateX(-50%); width: 100px; height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    border-radius: 2px;
}

/* --- Lottie Animation Section --- */
#lottie-section {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: -2rem 0;
}

/* --- Enhanced Message Card --- */
.message-card {
    background: var(--card-gradient);
    border-radius: var(--border-radius); padding: 3.5rem;
    box-shadow: 0 20px 60px var(--shadow-color), 0 0 0 1px rgba(255, 255, 255, 0.1);
    text-align: center; position: relative; overflow: hidden;
}

.message-card::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-secondary), var(--accent-color));
}

#personal-greeting {
    font-family: 'Pacifico', cursive; font-size: 2.8rem; min-height: 8rem;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--accent-color); font-weight: 400; text-shadow: 0 0 20px var(--glow-color);
}

#personal-greeting > span { min-height: 3.5rem; line-height: 1.2; }

#personal-message {
    font-size: 1.2rem; line-height: 1.8;
    color: var(--text-subtle); margin-top: 1.5rem; font-weight: 300;
}

#personal-signature {
    margin-top: 2.5rem; font-style: italic;
    color: var(--accent-secondary); font-weight: 500; font-size: 1.1rem;
}

/* --- Enhanced Timeline --- */
.timeline { position: relative; max-width: 700px; margin: 0 auto; }

.timeline::after {
    content: ''; position: absolute; width: 4px;
    background: linear-gradient(180deg, var(--accent-color), var(--accent-secondary));
    top: 0; bottom: 0; left: 50%; margin-left: -2px;
    border-radius: 2px; box-shadow: 0 0 10px var(--glow-color);
}

.timeline-item {
    padding: 15px 50px; position: relative;
    background-color: inherit; width: 50%;
    opacity: 0; animation: slideInTimeline 0.8s ease-out forwards;
}

.timeline-item:nth-child(odd) { animation-delay: 0.2s; }
.timeline-item:nth-child(even) { animation-delay: 0.4s; }

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

.timeline-item::after {
   display: none;
}

.timeline-item.left { left: 0; text-align: right; }
.timeline-item.right { left: 50%; text-align: left; }
.timeline-item.right::after { left: -12px; }

.timeline-content {
    padding: 25px; background: var(--card-gradient);
    position: relative; border-radius: 15px;
    box-shadow: 0 10px 30px var(--shadow-color);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.timeline-image {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-content h3 {
    color: var(--accent-color); margin-bottom: 10px;
    font-size: 1.2rem; font-weight: 600;
}

.timeline-content p {
    color: var(--text-subtle); font-size: 0.95rem; line-height: 1.6;
}

/* --- Enhanced Gallery --- */
.gallery-grid, .video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.gallery-grid img {
    width: 100%; height: 250px; object-fit: cover;
    border-radius: 15px; box-shadow: 0 10px 30px var(--shadow-color);
    transition: var(--transition); cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gallery-grid img:hover {
    transform: scale(1.05) translateY(-10px);
    box-shadow: 0 20px 50px var(--shadow-color);
    filter: brightness(1.1);
}

/* --- Enhanced Video Section --- */
.video-wrapper {
    position: relative; padding-bottom: 56.25%; height: 0;
    border-radius: 15px; overflow: hidden;
    box-shadow: 0 15px 40px var(--shadow-color);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.video-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 60px var(--shadow-color);
}

.video-wrapper iframe {
    position: absolute; top: 0; left: 0;
    width: 100%; height: 100%; border: 0;
}

/* --- Enhanced Footer --- */
footer {
    text-align: center; padding: 40px;
    font-size: 1rem; color: var(--text-subtle);
    background: var(--card-gradient);
    border-radius: var(--border-radius); margin-top: 3rem;
    box-shadow: 0 10px 30px var(--shadow-color);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Enhanced Music Player --- */
#music-player {
    position: fixed; bottom: 0; left: 0; right: 0;
    height: 90px; background: rgba(30, 30, 63, 0.95);
    backdrop-filter: blur(20px); z-index: 100;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 -10px 40px var(--shadow-color);
}

.player-container {
    max-width: 1200px; margin: 0 auto; height: 100%;
    padding: 0 20px; display: flex; align-items: center;
    gap: 20px; justify-content: space-between;
}

#player-artwork {
    width: 60px; height: 60px; border-radius: 12px;
    object-fit: cover; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 2px solid var(--accent-color);
}

.player-info {
    display: flex; flex-direction: column;
    flex-grow: 1; min-width: 0; margin-left: 15px;
}

#player-title {
    font-weight: 600; color: var(--text-light);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    font-size: 1.1rem; margin-bottom: 2px;
}

#player-artist {
    font-size: 0.9rem; color: var(--text-subtle);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.player-controls {
    display: flex; align-items: center; gap: 20px;
}

.player-controls button {
    background: none; border: none; cursor: pointer;
    color: var(--text-light); transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
}

.player-controls button:hover { color: var(--accent-color); transform: scale(1.1); }
.player-controls button:active { transform: scale(0.95); }

#play-pause-btn {
    background: linear-gradient(145deg, var(--accent-color), #ff8fab);
    width: 56px; height: 56px; color: white;
    box-shadow: 0 5px 20px var(--glow-color);
}

#play-pause-btn:hover {
    color: white; transform: scale(1.05);
    box-shadow: 0 8px 25px var(--glow-color);
}

#prev-btn, #next-btn { width: 44px; height: 44px; }

/* --- Enhanced Lightbox --- */
.lightbox {
    display: none; position: fixed; z-index: 1000;
    padding-top: 50px; left: 0; top: 0;
    width: 100%; height: 100%; overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
}

.lightbox-content {
    margin: auto; display: block;
    width: 90%; max-width: 800px;
    animation: zoomIn 0.6s ease-out;
    border-radius: 15px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

@keyframes zoomIn {
    from { transform: scale(0.5) rotate(5deg); opacity: 0; }
    to { transform: scale(1) rotate(0deg); opacity: 1; }
}

.lightbox-close {
    position: absolute; top: 20px; right: 35px;
    color: #f1f1f1; font-size: 50px; font-weight: bold;
    transition: var(--transition); cursor: pointer;
    width: 60px; height: 60px; display: flex;
    align-items: center; justify-content: center;
    border-radius: 50%; background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

.lightbox-close:hover {
    color: var(--accent-color); transform: scale(1.1);
    background: rgba(0, 0, 0, 0.7);
}

/* --- Scroll Animations --- */
.fade-in-up {
    opacity: 0; transform: translateY(30px);
    transition: all 0.8s ease-out;
}
.fade-in-up.visible { opacity: 1; transform: translateY(0); }

/* --- Progress Bar --- */
.progress-bar {
    position: fixed; top: 0; left: 0;
    width: 0%; height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-secondary));
    z-index: 1001; transition: width 0.3s ease;
}

/* --- Typing cursor --- */
.typing .cursor { animation: blink 1s infinite; color: var(--accent-color); }
@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ======================================================= */
/* --- Enhanced Responsive Design (KODE REVISI MOBILE) --- */
/* ======================================================= */

@media (max-width: 768px) {
    /* Perbaikan untuk halaman index.html agar full-screen */
    #welcome-screen {
        padding: 0; /* Hapus padding agar kartu bisa penuh */
    }

    .welcome-content {
        width: 100%;
        height: 100%;
        max-width: 100%; /* Menimpa max-width desktop */
        margin: 0;
        border-radius: 0; /* Hapus sudut melengkung */
        display: flex;
        flex-direction: column;
        justify-content: center; /* Konten di tengah vertikal */
        padding: 2rem 1.5rem;
    }

    .welcome-content h2 {
        font-size: 1.6rem;
    }
    #year-display {
        font-size: 3rem;
    }
    .theme-option {
        width: 35px;
        height: 35px;
    }

    /* Perbaikan untuk halaman ucapan.html */
    main {
        padding: 1.5rem 1rem 8rem;
        gap: 3rem;
    }
    .section-title {
        font-size: 2.2rem;
    }
    #personal-greeting {
        font-size: 2rem;
        min-height: 6rem;
    }
    #personal-message {
        font-size: 1rem;
    }
    .message-card {
        padding: 2rem;
    }
    .timeline::after {
        left: 31px;
    }
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    .timeline-item.left,
    .timeline-item.right {
        left: 0;
        text-align: left;
    }
    .timeline-item.right::after,
    .timeline-item.left::after {
        left: 15px;
    }
    .gallery-grid,
    .video-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .player-container {
        padding: 0 15px;
        gap: 15px;
    }
    #player-artwork {
        width: 50px;
        height: 50px;
    }
    .player-info {
        margin-left: 10px;
    }
    #player-artist {
        display: none;
    }
    .player-controls {
        gap: 15px;
    }
    #play-pause-btn {
        width: 50px;
        height: 50px;
    }
    #prev-btn,
    #next-btn {
        width: 40px;
        height: 40px;
    }
    .lightbox-close {
        top: 10px;
        right: 20px;
        font-size: 40px;
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .welcome-content {
        padding: 1.5rem;
    }
    #lottie-gift-container dotlottie-wc {
        width: 200px !important;
        height: 200px !important;
    }
    .section-title {
        font-size: 1.8rem;
    }
    #personal-greeting {
        font-size: 1.6rem;
    }
    .timeline-content {
        padding: 20px;
    }
    #music-player {
        height: 80px;
    }
    body.with-player {
        padding-bottom: 80px;
    }
}