/* ==================== AUTH SCREEN ==================== */
.auth-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: var(--bg-primary);
}

.auth-screen::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(108, 92, 231, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(0, 206, 201, 0.15) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.auth-container {
    width: 100%;
    max-width: min(420px, calc(100% - 48px));
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow), var(--shadow-glow);
    position: relative;
    z-index: 1;
}

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

.auth-header h1 {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

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

.auth-form h2 {
    font-size: 1.3rem;
    margin-bottom: 24px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--option-bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.auth-error {
    color: var(--error);
    font-size: 0.9rem;
    margin-bottom: 16px;
    text-align: center;
    min-height: 20px;
}

.btn-full {
    width: 100%;
    max-width: 100%;
}

.auth-switch {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-switch a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: 24px 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    padding: 0 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* User Info in Header */
.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--option-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.user-info span {
    font-weight: 500;
    font-size: 0.9rem;
}

#userInfo.guest {
    opacity: 0.7;
}

/* Animated background */
body.dark-mode::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(108, 92, 231, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(0, 206, 201, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(253, 203, 110, 0.05) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px;
    position: relative;
    overflow-x: hidden;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    padding: 20px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow), var(--shadow-glow);
    overflow: visible;
    flex-wrap: wrap;
    gap: 12px;
    position: relative;
    z-index: 100;
}

.header h1 {
    font-size: 1.6rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.header-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    z-index: 0;
    isolation: isolate;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
    z-index: 0;
    pointer-events: none;
}

@media (hover: hover) {
    .btn:hover::before {
        left: 100%;
    }
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

@media (hover: hover) {
    .btn-primary:hover:not(:disabled) {
        transform: translateY(-3px);
        box-shadow: 0 8px 25px var(--accent-glow);
    }
}

.btn-primary:active:not(:disabled) {
    transform: translateY(-1px);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.btn:disabled {
    pointer-events: none;
}

.btn:disabled::before {
    display: none;
}

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

@media (hover: hover) {
    .btn-secondary:hover {
        background: var(--option-hover);
        border-color: var(--accent);
        transform: translateY(-2px);
    }
}

.btn-google {
    background: #ffffff;
    color: #3c4043;
    border: 1px solid #dadce0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: background 0.2s, box-shadow 0.2s;
}

.btn-google .google-icon {
    flex-shrink: 0;
}

@media (hover: hover) {
    .btn-google:hover {
        background: #f7f8f8;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        transform: translateY(-1px);
    }
}

.dark-mode .btn-google {
    background: #2d2d3a;
    color: #e8eaed;
    border-color: #5f6368;
}

.dark-mode .btn-google:hover {
    background: #3c3c4a;
}

.btn-danger {
    background: var(--gradient-danger);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 118, 117, 0.3);
}

@media (hover: hover) {
    .btn-danger:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(255, 118, 117, 0.4);
    }
}

.btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    font-size: 1.3rem;
    box-shadow: var(--shadow);
}

@media (hover: hover) {
    .btn-icon:hover {
        transform: rotate(15deg) scale(1.1);
        background: var(--option-hover);
    }
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.15rem;
    border-radius: var(--radius);
    max-width: 100%;
}

/* Theme Toggle */
.dark-mode .icon-sun { display: none; }
.dark-mode .icon-moon { display: inline; }
body:not(.dark-mode) .icon-sun { display: inline; }
body:not(.dark-mode) .icon-moon { display: none; }

/* Tabs (scrollable) */
.tabs {
    margin-bottom: 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 6px;
}

.tabs-scroll {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    padding: 2px;
}

/* Mobile: scroll instead of wrap */
@media (max-width: 768px) {
    .tabs-scroll {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .tabs-scroll::-webkit-scrollbar {
        display: none;
    }
    
    .tab {
        flex-shrink: 0;
    }
}

.tab {
    padding: 10px 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.25s ease;
    position: relative;
    white-space: nowrap;
}

.tab:hover {
    background: var(--option-hover);
    color: var(--text-primary);
}

.tab.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.tab-content {
    display: none;
}

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

/* Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow-x: hidden;
    max-width: 100%;
}

@media (hover: hover) {
    .card:hover {
        box-shadow: var(--shadow), var(--shadow-glow);
    }
}

.hidden {
    display: none !important;
}