:root {
    --bg-color: #0b0f19;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.4);
    --glass-bg-hover: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(255, 255, 255, 0.15);
    
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    
    --danger: #f43f5e;
    --danger-hover: #e11d48;
    
    --gradient-1: #818cf8;
    --gradient-2: #c084fc;
    --gradient-3: #38bdf8;
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.5;
}

/* Animated Background Shapes */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    filter: blur(120px);
    border-radius: 50%;
    opacity: 0.4;
    animation: drift 25s infinite alternate cubic-bezier(0.5, 0, 0.5, 1);
}

.shape-1 {
    width: 45vw;
    height: 45vw;
    background: var(--gradient-1);
    top: -15%;
    left: -10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 35vw;
    height: 35vw;
    background: var(--gradient-2);
    bottom: -15%;
    right: -10%;
    animation-delay: -5s;
}

.shape-3 {
    width: 40vw;
    height: 40vw;
    background: var(--gradient-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes drift {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(6%, 8%) scale(1.1); }
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.header-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.badge {
    font-size: 0.9rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    color: var(--text-primary);
    -webkit-text-fill-color: initial;
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    outline: none;
}

.btn-icon {
    gap: 0.5rem;
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.5);
    filter: brightness(1.1);
}

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

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

.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: white;
    border: none;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.4);
    transition: all 0.3s ease;
    z-index: 10;
}

.fab svg {
    width: 24px;
    height: 24px;
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.6);
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }
    
    #add-btn-top {
        display: none;
    }
    
    .fab {
        display: flex;
    }
}

/* Grid & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow: var(--shadow-lg);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.card-url {
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-preview {
    width: 100%;
    height: 140px;
    border-radius: 0.75rem;
    overflow: hidden;
    position: relative;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    margin-top: 0.5rem;
}

.card-preview iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 400%; /* Scale width down 4x */
    height: 400%; /* Scale height down 4x */
    transform: scale(0.25);
    transform-origin: top left;
    border: none;
    pointer-events: none; /* Ignore clicks so the card handles them */
    background: white; /* Fallback for transparency */
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.card:hover .card-preview iframe {
    opacity: 1; /* Brighten preview on hover */
}

.card-notes {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.icon-btn {
    background: rgba(244, 63, 94, 0.1);
    color: var(--danger);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0;
}

.card:hover .icon-btn {
    opacity: 1;
}

.icon-btn:hover {
    background: var(--danger);
    color: white;
}

.icon-btn svg {
    width: 16px;
    height: 16px;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 5rem 2rem;
    text-align: center;
    background: var(--glass-bg);
    border: 1px dashed var(--glass-border);
    border-radius: 1rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    color: var(--glass-border-hover);
}

.empty-state p {
    font-size: 1.2rem;
    line-height: 1.6;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--glass-bg);
    transition: .4s;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-secondary);
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background: var(--accent-gradient);
    border-color: transparent;
}

input:checked + .slider:before {
    transform: translateX(20px);
    background-color: white;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.card-public-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Read-Only Mode Overrides */
body.read-only .header-actions #add-btn-top,
body.read-only .fab,
body.read-only .delete-btn,
body.read-only .card-public-toggle,
body.read-only #share-btn-top {
    display: none !important;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    border-radius: 1.5rem;
    transform: translateY(20px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.glass-panel {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s ease;
}

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

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

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

.input-group input:focus,
.input-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
    background: rgba(0, 0, 0, 0.3);
}

.input-group input::placeholder,
.input-group textarea::placeholder {
    color: rgba(148, 163, 184, 0.5);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

@media (max-width: 500px) {
    .modal-content {
        height: 100%;
        border-radius: 0;
        display: flex;
        flex-direction: column;
    }
    
    .modal-actions {
        margin-top: auto;
    }
}