/* 
 * Romantic Photo Album - Design System
 * Pastel color palette with modern aesthetics
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
    /* Pastel Color Palette */
    --color-pink-50: #FFF9FB;
    --color-pink-100: #FFE5EE;
    --color-pink-200: #FFD6E3;
    --color-pink-300: #FFC2D4;
    --color-pink-400: #FFB3C6;
    --color-pink-500: #FF9BB3;

    --color-lavender-50: #F9F9FF;
    --color-lavender-100: #E5E5FF;
    --color-lavender-200: #D6D6FF;
    --color-lavender-300: #C2C2FF;
    --color-lavender-400: #B3B3FF;
    --color-lavender-500: #9B9BFF;

    --color-mint-50: #F5FFFC;
    --color-mint-100: #E5FFF5;
    --color-mint-200: #D6FFE8;
    --color-mint-300: #C2FFD9;
    --color-mint-400: #B3FFCC;
    --color-mint-500: #9BFFBB;

    --color-peach-50: #FFFAF5;
    --color-peach-100: #FFE5D6;
    --color-peach-200: #FFD6C2;
    --color-peach-300: #FFC2A3;
    --color-peach-400: #FFB38A;
    --color-peach-500: #FF9B6B;

    --color-cream: #FFF9F5;
    --color-white: #FFFFFF;
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #EEEEEE;
    --color-gray-300: #E0E0E0;
    --color-gray-400: #BDBDBD;
    --color-gray-500: #9E9E9E;
    --color-gray-600: #757575;
    --color-gray-700: #616161;
    --color-gray-800: #424242;
    --color-gray-900: #212121;

    /* Semantic Colors */
    --color-primary: var(--color-pink-400);
    --color-secondary: var(--color-lavender-400);
    --color-accent: var(--color-peach-300);
    --color-success: var(--color-mint-400);
    --color-background: var(--color-cream);
    --color-surface: var(--color-white);
    --color-text: var(--color-gray-800);
    --color-text-light: var(--color-gray-600);
    --color-text-lighter: var(--color-gray-500);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-blur: blur(10px);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Outfit', var(--font-sans);

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

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

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text);
    background: linear-gradient(135deg, var(--color-pink-50) 0%, var(--color-lavender-50) 50%, var(--color-mint-50) 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--text-4xl);
}

h2 {
    font-size: var(--text-3xl);
}

h3 {
    font-size: var(--text-2xl);
}

h4 {
    font-size: var(--text-xl);
}

h5 {
    font-size: var(--text-lg);
}

h6 {
    font-size: var(--text-base);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-pink-500);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 500;
    line-height: 1.5;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-pink-400), var(--color-lavender-400));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--color-text);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.9);
    border-color: var(--color-primary);
}

.btn-danger {
    background: linear-gradient(135deg, #FF6B6B, #FF8787);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-danger:hover:not(:disabled) {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--text-lg);
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-text);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 179, 198, 0.1);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.card-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.card-body {
    color: var(--color-text-light);
}

/* ============================================
   MODAL
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-lg);
    opacity: 0;
    animation: fadeIn var(--transition-base) forwards;
}

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

.modal {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow: auto;
    box-shadow: var(--shadow-2xl);
    transform: scale(0.9);
    animation: scaleIn var(--transition-base) forwards;
}

@keyframes scaleIn {
    to {
        transform: scale(1);
    }
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--text-2xl);
    color: var(--color-gray-500);
    cursor: pointer;
    padding: var(--spacing-sm);
    line-height: 1;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ============================================
   UTILITIES
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

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

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

.mt-0 {
    margin-top: 0;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.hidden {
    display: none !important;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   FLOATING ADMIN BUTTON
   ============================================ */

.admin-floating-btn {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    font-size: 1.25rem;
    text-decoration: none;
    transition: all var(--transition-base);
    z-index: 999;
    cursor: pointer;
}

.admin-floating-btn:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: var(--shadow-xl);
    background: rgba(255, 255, 255, 0.95);
    border-color: var(--color-primary);
}

.admin-floating-btn span {
    display: block;
    transition: transform var(--transition-base);
}

/* ============================================
   GALLERY LAYOUTS
   ============================================ */

.gallery-header {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.gallery-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-pink-400), var(--color-lavender-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.gallery-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-light);
}

.gallery-controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.view-mode-selector {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
}

.view-mode-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--color-text-light);
    font-size: var(--text-sm);
}

.view-mode-btn.active {
    background: linear-gradient(135deg, var(--color-pink-400), var(--color-lavender-400));
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Grid Layout */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
}

.photo-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    cursor: pointer;
    aspect-ratio: 1;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-base);
}

.photo-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

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

.photo-item:hover img {
    transform: scale(1.1);
}

.photo-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.photo-item:hover .photo-overlay {
    transform: translateY(0);
}

.photo-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.photo-date {
    font-size: var(--text-sm);
    opacity: 0.9;
}

/* Masonry Layout */
.gallery-masonry {
    column-count: 3;
    column-gap: var(--spacing-lg);
    padding: var(--spacing-lg);
}

.gallery-masonry .photo-item {
    break-inside: avoid;
    margin-bottom: var(--spacing-lg);
    aspect-ratio: auto;
}

.gallery-masonry .photo-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* Slideshow Layout */
.gallery-slideshow {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.slideshow-container {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
}

.slideshow-slide {
    display: none;
    animation: slideIn var(--transition-slow);
}

.slideshow-slide.active {
    display: block;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slideshow-slide img {
    width: 100%;
    max-height: 70vh;
    object-fit: contain;
    background: var(--color-gray-900);
}

.slideshow-info {
    padding: var(--spacing-xl);
    text-align: center;
}

.slideshow-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    pointer-events: none;
}

.slideshow-btn {
    pointer-events: all;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--color-text);
    font-size: var(--text-xl);
}

.slideshow-btn:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-lg);
    transform: scale(1.1);
}

.slideshow-indicators {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    padding: var(--spacing-lg);
}

.slideshow-indicator {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--color-gray-300);
    cursor: pointer;
    transition: all var(--transition-base);
}

.slideshow-indicator.active {
    background: var(--color-primary);
    width: 24px;
}

/* Photo Modal */
.photo-modal .modal {
    max-width: 1200px;
}

.photo-modal-image {
    width: 100%;
    max-height: 60vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.photo-modal-info {
    text-align: center;
}

.photo-modal-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.photo-modal-date {
    font-size: var(--text-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.photo-modal-message {
    font-size: var(--text-lg);
    line-height: 1.8;
    color: var(--color-text);
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-pink-50), var(--color-lavender-50));
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-pink-200);
}

/* ============================================
   ADMIN PANEL STYLES
   ============================================ */

.admin-header {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.admin-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.admin-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin: 0;
}

.upload-area {
    border: 2px dashed var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3xl);
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-2xl);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--color-lavender-400);
    background: rgba(255, 255, 255, 0.9);
    transform: scale(1.02);
}

.upload-icon {
    font-size: var(--text-5xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.upload-text {
    font-size: var(--text-lg);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.upload-hint {
    font-size: var(--text-sm);
    color: var(--color-text-light);
}

.photo-list {
    display: grid;
    gap: var(--spacing-lg);
}

.photo-list-item {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 120px 1fr auto;
    gap: var(--spacing-lg);
    align-items: center;
    transition: all var(--transition-base);
}

.photo-list-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(4px);
}

.photo-list-thumbnail {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.photo-list-info {
    flex: 1;
}

.photo-list-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-direction: column;
}

.settings-grid {
    display: grid;
    gap: var(--spacing-lg);
    max-width: 600px;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.login-card {
    max-width: 400px;
    width: 100%;
}

.login-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-pink-400), var(--color-lavender-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    :root {
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
        --text-3xl: 1.5rem;
        --text-2xl: 1.25rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .modal {
        margin: var(--spacing-md);
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-lg);
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }

    .gallery-masonry {
        column-count: 2;
    }

    .photo-list-item {
        grid-template-columns: 80px 1fr;
        gap: var(--spacing-md);
    }

    .photo-list-thumbnail {
        width: 80px;
        height: 80px;
    }

    .photo-list-actions {
        grid-column: 1 / -1;
        flex-direction: row;
    }
}

@media (max-width: 480px) {
    .gallery-masonry {
        column-count: 1;
    }

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