/* ================================================
   SKOLEFOTO PLATFORM – MODERN PROTOTYPE
   Clean, Nordic, Premium Design
   ================================================ */

/* Custom Properties */
:root {
    /* Colors */
    --color-bg: #F8FAFC;
    --color-bg-elevated: #FFFFFF;
    --color-surface: #FFFFFF;
    --color-text: #0F172A;
    --color-text-secondary: #475569;
    --color-text-muted: #94A3B8;
    --color-border: #E2E8F0;
    --color-border-subtle: #F1F5F9;
    
    /* Accent */
    --color-primary: #6366F1;
    --color-primary-light: #818CF8;
    --color-primary-subtle: #EEF2FF;
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    
    /* Semantic */
    --color-success: #10B981;
    --color-success-subtle: #ECFDF5;
    
    /* Typography */
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

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

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

[data-animate] {
    animation: fadeInUp 0.6s var(--transition-normal) forwards;
    opacity: 0;
}

[data-animate]:nth-child(1) { animation-delay: 0.1s; }
[data-animate]:nth-child(2) { animation-delay: 0.2s; }
[data-animate]:nth-child(3) { animation-delay: 0.3s; }

/* ================================================
   ZONE 1: INTRO
   ================================================ */
.intro {
    position: relative;
    padding: var(--space-3xl) 0 var(--space-2xl);
    background: var(--color-bg-elevated);
    overflow: hidden;
}

.intro-blur {
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.intro-content {
    position: relative;
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
}

.logo-mark {
    display: inline-flex;
    margin-bottom: var(--space-lg);
}

.logo-mark svg {
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.3));
}

.intro h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.intro-lead {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
    margin-bottom: var(--space-lg);
}

.intro-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.badge {
    display: inline-flex;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

/* ================================================
   ZONE 2 & 3: MAIN CONTENT
   ================================================ */
.main-content {
    padding: var(--space-2xl) 0 var(--space-3xl);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-2xl);
    align-items: start;
}

/* ================================================
   DEVICE MOCKUP
   ================================================ */
.mockup-section {
    width: 100%;
}

.device-frame {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--color-border-subtle);
}

.device-notch {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 6px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    z-index: 10;
}

.device-screen {
    background: var(--color-bg);
}

/* App Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    padding-top: var(--space-xl);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border-subtle);
}

.app-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text);
}

.app-logo-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.app-logo-icon svg {
    width: 100%;
    height: 100%;
}

.app-user {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8125rem;
    font-weight: 600;
}

.user-info {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
}

.user-via {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Child Selector */
.child-selector {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border-subtle);
}

.child-tabs {
    display: flex;
    gap: var(--space-sm);
}

.child-tab {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.child-tab:hover {
    background: var(--color-border-subtle);
}

.child-tab.active {
    background: var(--color-primary-subtle);
    border-color: var(--color-primary);
}

.child-avatar {
    width: 36px;
    height: 36px;
    background: var(--color-border);
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.child-tab.active .child-avatar {
    background: var(--gradient-primary);
    color: white;
}

.child-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.3;
}

.child-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.child-class {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Child Content */
.child-content {
    display: none;
}

.child-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* Photo Section */
.photo-section {
    padding: var(--space-lg);
}

.section-header {
    margin-bottom: var(--space-lg);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-title h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.year-badge {
    display: inline-flex;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

/* Photo Grid */
.photo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.photo-main {
    display: flex;
    justify-content: center;
}

.photo-card {
    position: relative;
    cursor: pointer;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.photo-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.photo-card.featured {
    width: 100%;
    max-width: 220px;
}

.photo-image {
    position: relative;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.photo-image svg {
    display: block;
    width: 100%;
    height: auto;
}

.photo-image img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
}

.photo-card.featured .photo-image img {
    max-height: 280px;
}

.photo-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.photo-card:hover .photo-overlay {
    background: rgba(15, 23, 42, 0.3);
}

.view-icon, .play-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: white;
    border-radius: var(--radius-full);
    color: var(--color-text);
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-spring);
    box-shadow: var(--shadow-md);
}

.view-icon.small, .play-icon.small {
    width: 32px;
    height: 32px;
}

.photo-card:hover .view-icon,
.photo-card:hover .play-icon {
    opacity: 1;
    transform: scale(1);
}

.photo-overlay.video {
    background: rgba(15, 23, 42, 0.2);
}

.photo-overlay.video .play-icon {
    opacity: 1;
    transform: scale(1);
    background: var(--gradient-primary);
    color: white;
}

.photo-card:hover .photo-overlay.video {
    background: rgba(15, 23, 42, 0.4);
}

.photo-card:hover .photo-overlay.video .play-icon {
    transform: scale(1.1);
}

.photo-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm);
    margin-top: var(--space-sm);
}

.photo-type {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
}

.photo-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Photo Thumbnails */
.photo-thumbnails {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

.photo-thumbnails .photo-card {
    aspect-ratio: 1;
}

.photo-thumbnails .photo-image {
    height: 100%;
}

.photo-thumbnails .photo-image svg {
    height: 100%;
    object-fit: cover;
}

.photo-thumbnails .photo-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 1;
}

.thumb-label {
    display: block;
    text-align: center;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

/* Purchase Button */
.purchase-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.purchase-btn:hover {
    background: var(--color-border-subtle);
    border-style: solid;
    color: var(--color-text);
}

.purchase-btn svg {
    flex-shrink: 0;
}

.optional-tag {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    padding: 2px 6px;
    background: var(--color-border-subtle);
    border-radius: var(--radius-sm);
}

/* History Section */
.history-section {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border-subtle);
}

.history-section h3 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.history-section h3 svg {
    opacity: 0.6;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    width: 100%;
    text-align: left;
}

.history-item:hover {
    background: var(--color-border-subtle);
    border-color: var(--color-border);
    transform: translateX(4px);
}

.history-year {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
}

.history-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.history-count {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.history-meta svg {
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.history-item:hover .history-meta svg {
    transform: translateX(4px);
    color: var(--color-primary);
}

/* Security Footer */
.security-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-success-subtle);
    font-size: 0.8125rem;
    color: var(--color-success);
}

.security-footer svg {
    flex-shrink: 0;
}

/* ================================================
   EXPLANATION BOXES
   ================================================ */
.explanation-boxes {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    position: sticky;
    top: var(--space-lg);
}

.info-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
}

.info-box:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-primary-subtle);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.info-box h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.info-box ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.info-box li {
    position: relative;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding-left: var(--space-lg);
    line-height: 1.5;
}

.info-box li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    opacity: 0.5;
}

/* ================================================
   ZONE 4: CLOSING
   ================================================ */
.closing {
    padding: var(--space-2xl) 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border-subtle);
    text-align: center;
}

.closing p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    max-width: 560px;
    margin: 0 auto;
}

/* ================================================
   LIGHTBOX
   ================================================ */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 44px;
    height: 44px;
    background: white;
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

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

.lightbox-content {
    max-width: 500px;
    width: 90%;
    transform: scale(0.9);
    transition: transform var(--transition-spring);
}

.lightbox.active .lightbox-content {
    transform: scale(1);
}

.lightbox-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.lightbox-image svg {
    display: block;
    width: 100%;
    height: auto;
}

.lightbox-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.lightbox-title {
    font-size: 1rem;
    font-weight: 600;
    color: white;
}

.lightbox-date {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ================================================
   TOAST NOTIFICATION
   ================================================ */
.toast {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-text);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    opacity: 0;
    transition: all var(--transition-spring);
}

.toast.active {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast svg {
    color: var(--color-success);
    flex-shrink: 0;
}

/* ================================================
   RESPONSIVE DESIGN
   ================================================ */
@media (max-width: 1100px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .explanation-boxes {
        position: static;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-md);
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 20px;
        --space-xl: 28px;
        --space-2xl: 40px;
        --space-3xl: 56px;
    }

    .intro {
        padding: var(--space-2xl) 0;
    }

    .intro h1 {
        font-size: 1.5rem;
    }

    .intro-lead {
        font-size: 1rem;
    }

    .intro-note {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .photo-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .photo-main {
        order: -1;
    }

    .photo-card.featured {
        max-width: 180px;
    }

    .photo-thumbnails {
        grid-template-columns: repeat(4, 1fr);
    }

    .explanation-boxes {
        grid-template-columns: 1fr;
    }

    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }

    .child-tabs {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .device-frame {
        border-radius: var(--radius-lg);
    }

    .photo-section {
        padding: var(--space-md);
    }

    .photo-thumbnails {
        grid-template-columns: repeat(2, 1fr);
    }

    .child-tab {
        padding: var(--space-sm);
    }

    .child-info {
        display: none;
    }

    .child-avatar {
        width: 40px;
        height: 40px;
    }

    .lightbox-close {
        top: var(--space-md);
        right: var(--space-md);
    }
}

/* Focus states for accessibility */
.child-tab:focus-visible,
.photo-card:focus-visible,
.history-item:focus-visible,
.purchase-btn:focus-visible,
.lightbox-close:focus-visible {
    outline: none;
    box-shadow: var(--shadow-glow);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}