@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;700&family=Outfit:wght@300;400;500;700&family=Playfair+Display:ital,wght@0,400;0,600;0,900;1,400&family=Noto+Sans+KR:wght@300;400;500&display=swap');

:root {
    --bg-deep: #050f14;
    --bg-gradient-start: #0a1f26;
    --bg-gradient-end: #000000;
    --accent-gold: #c8a165;
    --accent-gold-light: #e6c896;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);

    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-hover: rgba(200, 161, 101, 0.1);

    --font-heading: 'Playfair Display', serif;
    --font-body: 'Outfit', 'Noto Sans KR', sans-serif;
    --font-decorative: 'Cinzel', serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-deep);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow-x: hidden;
    min-height: 100vh;
}

.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% -20%, var(--bg-gradient-start), var(--bg-gradient-end) 90%);
    z-index: -1;
}

#snow-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: linear-gradient(to bottom, rgba(5, 15, 20, 0.8), transparent);
    backdrop-filter: blur(5px);
}

.logo {
    font-family: var(--font-decorative);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: #fff;
    text-transform: uppercase;
}

.logo img {
    height: 32px;
    width: auto;
}

.season-tag {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 50px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 80px 2rem 0;
}

.hero-content {
    z-index: 10;
    opacity: 0;
    animation: fadeUp 1.2s ease-out forwards;
    animation-delay: 0.5s;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    font-family: var(--font-decorative);
    font-size: 0.9rem;
    color: var(--accent-gold);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    position: relative;
}

.hero-badge::before,
.hero-badge::after {
    content: '';
    display: inline-block;
    width: 30px;
    height: 1px;
    background: var(--accent-gold);
    vertical-align: middle;
    margin: 0 1rem;
    opacity: 0.5;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 5rem);
    line-height: 1.2;
    margin-bottom: 2rem;
    font-weight: 400;
}

.highlight-text {
    font-style: italic;
    color: var(--accent-gold);
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.scroll-indicator {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.5;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    padding-top: 2rem;
}

.scroll-indicator .line {
    width: 1px;
    height: 40px;
    background: #fff;
    animation: scrollLine 2s infinite;
}

/* Features Section */
.features {
    padding: 0rem 2rem 10rem;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.feature-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2.5rem;
    min-height: 320px;
    /* Reduced min-height for better PC proportion */
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    border-color: var(--accent-gold);
    background: var(--card-hover);
    transform: translateY(-5px);
}

.card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(200, 161, 101, 0.1), transparent 60%);
    opacity: 0;
    transition: 0.6s;
    pointer-events: none;
}

.feature-card:hover .card-bg {
    opacity: 1;
}

.card-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: space-between;
}

.icon-box {
    font-size: 2.2rem;
    color: var(--accent-gold);
    margin-bottom: 2rem;
    transition: 0.4s;
    width: fit-content;
}

.feature-card:hover .icon-box {
    transform: scale(1.1);
    color: var(--accent-gold-light);
}

/* Text Container */
.text-box {
    margin-top: auto;
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
    font-weight: 400;
    line-height: 1.2;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
    max-width: 90%;
}

.link-arrow {
    position: absolute;
    bottom: 2.5rem;
    right: 2.5rem;
    color: var(--accent-gold);
    font-size: 1.5rem;
    transition: 0.3s;
    opacity: 0;
    transform: translateX(-10px);
}

.feature-card:hover .link-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Large Grid Item (Span 2) */
/* Large Grid Item (Span 2) - Reset for single column layout */
.feature-card.large {
    grid-column: span 1;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1.5rem;
        background: rgba(5, 15, 20, 0.9);
    }

    .hero-title {
        font-size: 3rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature-card.large {
        grid-column: span 1;
    }

    .feature-card {
        min-height: auto;
    }
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    border-top: 1px solid var(--card-border);
    margin-top: 4rem;
}

/* Animations */
@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }

    50% {
        transform: scaleY(1);
        transform-origin: top;
    }

    51% {
        transform: scaleY(1);
        transform-origin: bottom;
    }

    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* Generate Page Utils */
.generate-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-top: 2rem;
}

.generate-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.generate-subtitle {
    color: var(--text-secondary);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 80px 2rem 2rem;
    position: relative;
    z-index: 10;
}

.upload-container {
    background: rgba(5, 15, 20, 0.6);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.drop-zone {
    border: 1px dashed var(--accent-gold);
    background: rgba(200, 161, 101, 0.05);
    border-radius: 12px;
    padding: 4rem 2rem;
    transition: 0.3s;
    cursor: pointer;
    margin-bottom: 2rem;
}

.drop-zone:hover {
    background: rgba(200, 161, 101, 0.1);
    border-color: var(--accent-gold-light);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gold);
    color: #050f14;
    padding: 1rem 3rem;
    font-weight: 600;
    text-decoration: none;
    transition: 0.3s;
    cursor: pointer;
    border: none;
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
}

.btn:hover {
    background: var(--accent-gold-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(200, 161, 101, 0.2);
}

.nav-back {
    color: var(--text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    transition: 0.3s;
}

.nav-back:hover {
    color: var(--accent-gold);
    transform: translateX(-5px);
}

/* Loading & Animation */
.loading {
    display: none;
    margin: 3rem 0;
}

.sparkle {
    width: 60px;
    height: 60px;
    background: var(--accent-gold);
    mask: url('data:image/svg+xml;utf8,<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M12 2L14.5 9L22 12L14.5 15L12 22L9.5 15L2 12L9.5 9L12 2Z"/></svg>') center/contain no-repeat;
    -webkit-mask: url('data:image/svg+xml;utf8,<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M12 2L14.5 9L22 12L14.5 15L12 22L9.5 15L2 12L9.5 9L12 2Z"/></svg>') center/contain no-repeat;
    margin: 0 auto;
    animation: rotate 3s linear infinite, scale 1.5s ease-in-out infinite alternate;
}

.preview-area {
    display: none;
    margin-top: 3rem;
    animation: fadeUp 0.5s ease-out;
}

.preview-img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--card-border);
    margin-bottom: 2rem;
}

@keyframes rotate {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes scale {
    from {
        transform: scale(0.8);
    }

    to {
        transform: scale(1.2);
    }
}

/* Magic Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.modal-overlay.active {
    display: flex;
}

.magic-modal {
    background: var(--bg-deep);
    border: 1px solid var(--accent-gold);
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 0 30px rgba(200, 161, 101, 0.2);
    animation: fadeUp 0.3s ease-out;
}

.magic-modal h3 {
    font-family: var(--font-heading);
    color: var(--accent-gold);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.magic-input-group {
    margin-bottom: 1.5rem;
}

.magic-input {
    width: 100%;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    border-radius: 8px;
    text-align: center;
    font-family: var(--font-body);
    font-size: 1.1rem;
    transition: 0.3s;
}

.magic-input:focus {
    outline: none;
    border-color: var(--accent-gold);
    background: rgba(255, 255, 255, 0.1);
}

.magic-input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.magic-modal .btn {
    width: 100%;
    padding: 0.8rem;
}

.error-msg {
    color: #ff6b6b;
    font-size: 0.9rem;
    margin-top: 0.8rem;
    min-height: 1.2em;
    opacity: 0;
    transition: 0.3s;
}

.error-msg.visible {
    opacity: 1;
}

/* Instruction Card */
.instruction-card {
    background: rgba(200, 161, 101, 0.1);
    border: 1px solid rgba(200, 161, 101, 0.3);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
    text-align: left;
    backdrop-filter: blur(10px);
}

.instruction-icon {
    font-size: 2rem;
    line-height: 1;
}

.instruction-content h3 {
    font-family: var(--font-heading);
    color: var(--accent-gold);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.instruction-content p {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.3rem;
    font-weight: 500;
}

.instruction-content .sub-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    font-weight: 400;
}

@media (max-width: 768px) {
    .instruction-card {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
        align-items: center;
    }
}

.instruction-list {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0 0;
}

.instruction-list li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.5;
    font-weight: 500;
}

.instruction-list li:last-child {
    margin-bottom: 0;
}

.instruction-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    top: -2px;
    color: var(--accent-gold);
    font-size: 1.5rem;
    line-height: 1;
}

.instruction-list .sub-text {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
}