/* QuickCollage Maker & Editor - InShot-Inspired Design */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

:root {
    /* Color Palette */
    --primary-red: hsl(0, 85%, 55%);
    --primary-pink: hsl(330, 85%, 60%);
    --accent-orange: hsl(25, 95%, 50%);

    /* Neutrals */
    --bg-dark: hsl(0, 0%, 8%);
    --bg-dark-elevated: hsl(0, 0%, 12%);
    --bg-section: hsl(0, 0%, 10%);

    --text-primary: hsl(0, 0%, 98%);
    --text-secondary: hsl(0, 0%, 70%);
    --text-muted: hsl(0, 0%, 50%);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-pink) 100%);

    /* Typography */
    --font-display: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.7) 100%);
    z-index: 1;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
}

/* Top Bar */
.top-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.social-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    transition: all var(--transition-base);
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Hero Title */
.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: white;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-top: 2rem;
    font-weight: 400;
}

/* Download Buttons */
.download-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.store-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    text-decoration: none;
    font-family: var(--font-body);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.store-btn:hover {
    background: rgba(0, 0, 0, 0.85);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.store-btn-icon {
    font-size: 2rem;
}

.store-btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.store-btn-label {
    font-size: 0.7rem;
    opacity: 0.8;
    text-transform: uppercase;
}

.store-btn-name {
    font-size: 1.1rem;
    font-weight: 700;
}

/* CTA Button */
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50px;
    color: white;
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(255, 50, 100, 0.4);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(255, 50, 100, 0.6);
}

/* Showcase Section */
.showcase {
    background: var(--bg-section);
    padding: 5rem 2rem;
    position: relative;
}

.showcase-container {
    max-width: 1400px;
    margin: 0 auto;
}

.showcase-header {
    margin-bottom: 1rem;
}

.showcase-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.showcase-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    background: var(--bg-dark-elevated);
    transition: all var(--transition-base);
    cursor: pointer;
    aspect-ratio: 9/16;
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    opacity: 0;
    transition: all var(--transition-base);
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

/* App Section */
.app-section {
    background: var(--bg-dark);
    padding: 5rem 2rem;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.app-workspace {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.collage-grid {
    width: 100%;
    height: 100%;
    display: grid;
    gap: 12px;
}

.collage-grid.layout-2x2 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
}

.collage-cell {
    background: rgba(255, 255, 255, 0.03);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    min-height: 200px;
}

.collage-cell:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-pink);
    transform: scale(1.02);
}

.collage-cell.has-image {
    border-style: solid;
}

.collage-cell img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-icon {
    font-size: 3rem;
    opacity: 0.3;
}

/* Controls Panel */
.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.control-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.control-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.btn {
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 968px) {
    .app-container {
        grid-template-columns: 1fr;
    }

    .top-bar {
        padding: 1rem 1.5rem;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .store-btn {
        padding: 0.75rem 1.5rem;
        gap: 0.5rem;
    }

    .store-btn-icon {
        font-size: 1.5rem;
    }

    .store-btn-label {
        font-size: 0.6rem;
    }

    .store-btn-name {
        font-size: 0.9rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

/* Utility Classes */
.hidden {
    display: none;
}

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