/* ====================================
   CSS Variables & Base Styles
   ==================================== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --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);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 280px;
}

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

html,
body {
    height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ====================================
   Flash Messages
   ==================================== */
.flash-messages {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.flash-message {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    animation: slideIn 0.3s ease;
    transition: opacity 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

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

.flash-success {
    background: rgba(34, 197, 94, 0.15);
    border-color: rgba(34, 197, 94, 0.3);
}

.flash-error {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
}

.flash-warning {
    background: rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.3);
}

.flash-info {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
}

.flash-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    margin-left: 12px;
    transition: var(--transition);
}

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

/* ====================================
   Login Page
   ==================================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #a855f7, #ec4899);
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #06b6d4, #3b82f6);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(20px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(30px, 10px) scale(1.02);
    }
}

.login-card {
    position: relative;
    width: 100%;
    max-width: 420px;
    padding: 48px 40px;
    background: var(--bg-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.logo svg {
    width: 32px;
    height: 32px;
    color: white;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

.login-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.feature svg {
    width: 20px;
    height: 20px;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.feature span {
    color: var(--text-secondary);
    font-size: 14px;
}

.google-signin-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 24px;
    background: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    color: #1f1f1f;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.google-signin-btn:active {
    transform: translateY(0);
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--text-muted);
}

/* ====================================
   Gallery Layout
   ==================================== */
.gallery-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo-small {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-small svg {
    width: 28px;
    height: 28px;
    padding: 5px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    color: white;
}

.logo-small span {
    font-size: 18px;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-primary);
}

.user-details {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.folder-nav {
    flex: 1;
    padding: 20px 16px;
    overflow-y: auto;
}

.folder-nav h3 {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 12px;
    padding: 0 8px;
}

.folder-list {
    list-style: none;
    margin-bottom: 16px;
}

.folder-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    margin-bottom: 4px;
}

.folder-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.folder-item:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.folder-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-primary);
}

.folder-item.active svg {
    color: var(--accent-primary);
}

.new-folder-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.new-folder-btn svg {
    width: 18px;
    height: 18px;
}

.new-folder-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.logout-btn svg {
    width: 18px;
    height: 18px;
}

.logout-btn:hover {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px 32px;
    min-height: 100vh;
}

.main-content.drag-over {
    background: rgba(99, 102, 241, 0.05);
}

.main-content.drag-over::after {
    content: 'Drop files to upload';
    position: fixed;
    inset: 0;
    left: var(--sidebar-width);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 500;
    color: var(--accent-primary);
    background: rgba(10, 10, 15, 0.9);
    border: 3px dashed var(--accent-primary);
    margin: 24px;
    border-radius: var(--radius-lg);
    pointer-events: none;
}

.gallery-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.header-left h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 4px;
}

.picture-count {
    font-size: 14px;
    color: var(--text-muted);
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.upload-btn svg {
    width: 18px;
    height: 18px;
}

.upload-btn input[type="file"] {
    display: none;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.5);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.download-all-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.download-all-btn svg {
    width: 18px;
    height: 18px;
}

.download-all-btn:hover {
    background: var(--success);
    border-color: var(--success);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(34, 197, 94, 0.4);
}

/* Picture Grid */
.picture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.picture-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
}

.picture-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.picture-thumbnail {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--bg-secondary);
}

.picture-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.picture-card:hover .picture-thumbnail img {
    transform: scale(1.05);
}

.picture-info {
    padding: 12px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.picture-name {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.picture-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: var(--transition);
}

.picture-card:hover .picture-actions {
    opacity: 1;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.action-btn svg {
    width: 14px;
    height: 14px;
}

.action-btn:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.delete-btn:hover {
    background: var(--error);
    border-color: var(--error);
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 20px;
}

.empty-state svg {
    width: 80px;
    height: 80px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.empty-state h2 {
    font-size: 24px;
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.empty-state .upload-btn.primary {
    padding: 14px 28px;
    font-size: 15px;
}

/* ====================================
   Modal
   ==================================== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal-content {
    width: 100%;
    max-width: 400px;
    margin: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: var(--transition);
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.form-group {
    padding: 24px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.modal-actions {
    display: flex;
    gap: 12px;
    padding: 0 24px 24px;
    justify-content: flex-end;
}

.btn {
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.btn-primary {
    background: var(--accent-gradient);
    border: none;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* ====================================
   Lightbox
   ==================================== */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.lightbox-container {
    display: flex;
    width: 95vw;
    height: 90vh;
    max-width: 1400px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* Lightbox Main Image Area */
.lightbox-main {
    flex: 1;
    position: relative;
    background: black;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.image-wrapper {
    position: relative;
    display: inline-block;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    transition: var(--transition);
}

.lightbox-close:hover {
    background: var(--error);
}

#reaction-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.reaction-marker {
    position: absolute;
    transform: translate(-50%, -50%);
    font-size: 24px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5));
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: auto;
    cursor: help;
}

@keyframes popIn {
    from {
        transform: translate(-50%, -50%) scale(0);
    }

    to {
        transform: translate(-50%, -50%) scale(1);
    }
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.lightbox-nav svg {
    width: 24px;
    height: 24px;
}

.lightbox-nav:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
    left: -70px;
}

.lightbox-next {
    right: -70px;
}

#lightbox-img {
    max-width: 100%;
    max-height: calc(90vh - 80px);
    object-fit: contain;
    border-radius: var(--radius-md);
}

.lightbox-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-top: 16px;
}

.lightbox-caption {
    font-size: 14px;
    color: var(--text-secondary);
}

.lightbox-counter {
    font-size: 12px;
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .lightbox-nav {
        width: 40px;
        height: 40px;
    }

    .lightbox-prev {
        left: 10px;
    }

    .lightbox-next {
        right: 10px;
    }

    .lightbox-nav svg {
        width: 20px;
        height: 20px;
    }
}

/* ====================================
   Loading State
   ==================================== */
body.uploading::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 400;
}

body.uploading::before {
    content: '';
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 401;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Lightbox Sidebar */
.lightbox-sidebar {
    width: 350px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-section {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-section:last-child {
    border-bottom: none;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.sidebar-section h3 {
    font-size: 14px;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.comments-list {
    flex: 1;
    overflow-y: auto;
    min-height: 200px;
    max-height: 400px;
    margin-bottom: 16px;
    padding-right: 8px;
}

.comment-item {
    margin-bottom: 16px;
    animation: fadeIn 0.3s ease;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    font-size: 12px;
}

.comment-author {
    color: var(--accent-primary);
    font-weight: 600;
}

.comment-date {
    color: var(--text-muted);
}

.comment-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-word;
}

.comment-input-area {
    display: flex;
    gap: 8px;
}

#comment-input {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
}

.btn-send {
    padding: 0 12px;
    background: var(--accent-primary);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.btn-send:hover {
    filter: brightness(1.1);
}

.reaction-help {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.reaction-picker {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.reaction-picker.hidden {
    display: none;
}

.reaction-picker button {
    background: none;
    border: none;
    font-size: 24px;
    padding: 8px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.reaction-picker button:hover {
    background: var(--bg-glass);
    transform: scale(1.2);
}

/* ====================================
   Responsive
   ==================================== */
@media (max-width: 1024px) {
    .lightbox-container {
        flex-direction: column;
        height: 100vh;
        width: 100vw;
        border-radius: 0;
    }

    .lightbox-sidebar {
        width: 100%;
        height: 40%;
        border-left: none;
        border-top: 1px solid var(--border-color);
    }

    .comments-list {
        max-height: 150px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: var(--transition);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

    .main-content.drag-over::after {
        left: 0;
    }

    .gallery-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .picture-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 12px;
    }

    .picture-actions {
        opacity: 1;
    }
}