:root {
    --bg-color: #0f111a;
    --card-bg: rgba(25, 28, 41, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --accent-color: #8b5cf6;
    --accent-hover: #7c3aed;
    --success-color: #10b981;
    --error-color: #ef4444;
    --blob-1: #6366f1;
    --blob-2: #c026d3;
    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    z-index: -1;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s infinite alternate;
}

.source-blob {
    top: -20%;
    left: -20%;
    width: 120vw;
    height: 120vh;
    background: radial-gradient(circle, var(--blob-1) 0%, transparent 60%);
}

.dest-blob {
    bottom: -20%;
    right: -20%;
    width: 120vw;
    height: 120vh;
    background: radial-gradient(circle, var(--blob-2) 0%, transparent 60%);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(5%, 5%) scale(1.1); }
}

/* Global Layout */
.app-container {
    width: 100%;
    max-width: 1100px;
    height: 100vh;
    padding: 1rem 2rem;
    z-index: 1;
    display: flex;
    flex-direction: column;
}

#app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 0;
}

/* Header */
.app-header {
    text-align: center;
    margin-bottom: 1rem;
}

.mastodon-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    background: -webkit-linear-gradient(45deg, var(--blob-1), var(--blob-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.4));
}

.app-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    letter-spacing: -0.02em;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Glass Cards */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.section {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.section.active {
    display: flex;
    flex-direction: column;
    opacity: 1;
    transform: translateY(0);
    max-height: 100%;
}

#sync-section.active {
    height: 100%;
}

/* Auth Grid */
.auth-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: stretch;
}

#auth-section {
    overflow-y: auto;
}

.auth-card {
    background: rgba(0,0,0,0.2);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(255,255,255,0.05);
    min-width: 0;
}

.auth-card.logged-in {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.05);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.card-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

#dest-auth-card .card-header i {
    color: var(--accent-color);
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.auth-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.instruction {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.5rem;
    opacity: 0.5;
}

/* Forms & Inputs */
input[type="text"] {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    outline: none;
}

input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

input[type="text"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Buttons */
.primary-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    margin-top: auto;
}

.primary-btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

.primary-btn:disabled {
    background: #334155;
    color: #94a3b8;
    cursor: not-allowed;
}

.secondary-btn {
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.secondary-btn:hover {
    background: rgba(255,255,255,0.1);
}

/* Profile Info */
.profile-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    min-width: 0;
}

.avatar-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
}

.avatar-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #64748b;
    font-size: 1.2rem;
}

.profile-avatar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s ease;
}

.profile-details {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
}

.profile-name {
    font-weight: 600;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-handle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-top: auto;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border-color: rgba(239, 68, 68, 0.2);
}

/* Sync Section */
.sync-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.server-infobar {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
    background: rgba(0,0,0,0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}

.badge.source { color: var(--primary-color); }
.badge.dest { color: var(--accent-color); }

.sync-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tags-container {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    margin-bottom: 2rem;
    position: relative;
    padding: 0;
}

/* Custom Scrollbar */
.tags-container::-webkit-scrollbar {
    width: 6px;
}
.tags-container::-webkit-scrollbar-track {
    background: transparent;
}
.tags-container::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
}
.tags-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.2);
}

.tags-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    padding: 3rem 0;
}

.modern-tags-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
}

.tag-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    transition: var(--transition);
    cursor: pointer;
    user-select: none;
}

.tag-row:last-child {
    border-bottom: none;
}

.tag-row:hover:not(.disabled-row) {
    background: rgba(255,255,255,0.05);
}

.tag-row.selected {
    background: rgba(99, 102, 241, 0.1);
}

.tag-row.disabled-row {
    cursor: default;
    opacity: 0.6;
    background: rgba(0,0,0,0.1);
}

.tag-checkbox {
    width: 20px;
    height: 20px;
    border-radius: 6px;
    border: 2px solid var(--text-secondary);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.tag-row.selected .tag-checkbox {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.tag-row.selected .tag-checkbox::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 11px;
    color: white;
}

.tag-row.disabled-row .tag-checkbox {
    background: transparent;
    border-color: var(--success-color);
    opacity: 0.8;
}

.tag-row.disabled-row.is-checked .tag-checkbox::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 11px;
    color: var(--success-color);
}

.tag-name-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tag-name {
    font-weight: 500;
    font-size: 1rem;
    color: var(--text-primary);
}
.tag-name::before {
    content: '#';
    color: var(--text-secondary);
    margin-right: 2px;
}

.tag-status-pill {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.status-sync {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
}

.status-missing {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-color);
}

.status-dest {
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-color);
}

/* Success Section */
.success-content {
    text-align: center;
    padding: 2rem 0;
}

.success-icon {
    font-size: 4rem;
    color: var(--success-color);
    margin-bottom: 1.5rem;
    animation: scaleIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes scaleIn {
    0% { transform: scale(0); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.success-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.success-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--error-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.hidden {
    display: none !important;
}

/* Footer */
.app-footer {
    text-align: center;
    margin-top: auto;
    padding: 1.5rem 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap; /* Fallback for small screens */
}

.privacy-note {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.privacy-note i {
    color: var(--success-color);
}

.footer-divider {
    opacity: 0.3;
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);
    opacity: 0.7;
}

.footer-links a:hover {
    color: var(--text-primary);
    transform: translateY(-1px);
    opacity: 1;
}

.app-footer i {
    color: var(--success-color);
    margin-right: 0.2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .auth-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .auth-divider {
        transform: rotate(90deg);
        margin: 1rem 0;
    }
    
    .app-container {
        padding: 1rem;
    }
    
    .glass-card {
        padding: 1.5rem;
    }

    .footer-container {
        gap: 0.5rem;
    }
}