/* ============================================================
   AI Visibility Tool - App Interface
   Clean, minimal design for the authenticated application.
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --brand-purple: #6C5CE7;
    --brand-purple-dark: #5A4BD1;
    --brand-purple-light: #A29BFE;
    --brand-navy: #2D3047;
    --brand-navy-light: #3D405B;

    --surface-primary: #FFFFFF;
    --surface-secondary: #F8F9FC;
    --surface-tertiary: #F0F1F5;
    --surface-elevated: #FFFFFF;

    --text-primary: #1A1D2E;
    --text-secondary: #5F6388;
    --text-tertiary: #9498B5;
    --text-inverse: #FFFFFF;
    --text-link: #6C5CE7;

    --border-light: #E8E9F0;
    --border-medium: #D1D3E0;

    --success: #00B894;
    --warning: #FDCB6E;
    --danger: #E17055;
    --info: #74B9FF;

    --shadow-sm: 0 1px 3px rgba(45, 48, 71, 0.06);
    --shadow-md: 0 4px 12px rgba(45, 48, 71, 0.08);
    --shadow-lg: 0 8px 30px rgba(45, 48, 71, 0.12);
    --shadow-xl: 0 16px 48px rgba(45, 48, 71, 0.14);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--surface-secondary);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--text-link); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--brand-purple-dark); }

img { max-width: 100%; height: auto; display: block; }

/* --- Utility --- */
.text-secondary { color: var(--text-secondary) !important; }
.text-tertiary { color: var(--text-tertiary) !important; }

/* --- App Shell --- */
.app-topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 60px;
    background: var(--surface-primary);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    padding: 0 24px;
}

.app-topbar__logo {
    display: flex;
    align-items: center;
    gap: 0;
    text-decoration: none;
    flex-shrink: 0;
}

.app-topbar__logo img {
    height: 30px;
    width: auto;
}

.app-topbar__spacer { flex: 1; }

.app-topbar__nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.app-topbar__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
    border: none;
    background: none;
    cursor: pointer;
}

.app-topbar__link:hover {
    color: var(--text-primary);
    background: var(--surface-secondary);
}

.app-topbar__link--active {
    color: var(--brand-purple);
    background: rgba(108, 92, 231, 0.06);
}

.app-topbar__link--danger:hover {
    color: var(--danger);
    background: rgba(225, 112, 85, 0.06);
}

.app-topbar__divider {
    width: 1px;
    height: 24px;
    background: var(--border-light);
    margin: 0 4px;
}

.app-topbar__user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 12px 4px 4px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.app-topbar__avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-purple), var(--brand-purple-dark));
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    flex-shrink: 0;
}

/* --- App Content --- */
.app-content {
    padding-top: 60px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-main {
    flex: 1;
    padding: 32px 24px;
    max-width: 1120px;
    width: 100%;
    margin: 0 auto;
}

/* --- Page Header --- */
.page-header {
    margin-bottom: 32px;
}

.page-header__title {
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.page-header__subtitle {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* --- Cards --- */
.card {
    background: var(--surface-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card--elevated {
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

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

.card__title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card__body { padding: 24px; }

.card__body--flush { padding: 0; }

/* --- Stat Grid --- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--surface-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: box-shadow var(--transition-base);
}

.stat-card:hover { box-shadow: var(--shadow-md); }

.stat-card__label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.stat-card__value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.stat-card__meta {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.stat-card__icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    margin-bottom: 12px;
}

.stat-card__icon--purple { background: rgba(108, 92, 231, 0.1); color: var(--brand-purple); }
.stat-card__icon--green { background: rgba(0, 184, 148, 0.1); color: var(--success); }
.stat-card__icon--blue { background: rgba(116, 185, 255, 0.1); color: var(--info); }
.stat-card__icon--orange { background: rgba(225, 112, 85, 0.1); color: var(--danger); }

/* --- Data Table --- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table th {
    text-align: left;
    padding: 12px 24px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-light);
    background: var(--surface-secondary);
}

.data-table td {
    padding: 14px 24px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

.data-table tbody tr { transition: background var(--transition-fast); }
.data-table tbody tr:hover { background: var(--surface-secondary); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* --- Key-Value List --- */
.kv-list { list-style: none; }

.kv-list__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.875rem;
}

.kv-list__item:last-child { border-bottom: none; }

.kv-list__key {
    color: var(--text-secondary);
    font-weight: 500;
}

.kv-list__value {
    color: var(--text-primary);
    font-weight: 600;
    text-align: right;
}

/* --- Badge / Tag --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge--purple { background: rgba(108, 92, 231, 0.1); color: var(--brand-purple); }
.badge--green { background: rgba(0, 184, 148, 0.1); color: var(--success); }
.badge--orange { background: rgba(225, 112, 85, 0.1); color: var(--danger); }
.badge--gray { background: var(--surface-tertiary); color: var(--text-secondary); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    line-height: 1.4;
}

.btn:focus-visible {
    outline: 2px solid var(--brand-purple);
    outline-offset: 2px;
}

.btn--primary {
    background: var(--brand-purple);
    color: var(--text-inverse);
    border-color: var(--brand-purple);
}

.btn--primary:hover {
    background: var(--brand-purple-dark);
    border-color: var(--brand-purple-dark);
    color: var(--text-inverse);
    box-shadow: 0 4px 14px rgba(108, 92, 231, 0.35);
}

.btn--ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border-medium);
}

.btn--ghost:hover {
    background: var(--surface-secondary);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

.btn--sm { padding: 6px 14px; font-size: 0.8125rem; }
.btn--lg { padding: 14px 28px; font-size: 1rem; }
.btn--block { width: 100%; }

/* --- Form Elements --- */
.form-group { margin-bottom: 20px; }

.form-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 11px 14px;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--surface-primary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.form-input::placeholder { color: var(--text-tertiary); }

.form-input:focus {
    border-color: var(--brand-purple);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.12);
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 6px;
}

.form-hint a { color: var(--text-link); font-weight: 500; }

/* --- Alert --- */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
}

.alert--error {
    background: rgba(225, 112, 85, 0.08);
    color: var(--danger);
    border: 1px solid rgba(225, 112, 85, 0.2);
}

.alert--success {
    background: rgba(0, 184, 148, 0.08);
    color: var(--success);
    border: 1px solid rgba(0, 184, 148, 0.2);
}

.alert--info {
    background: rgba(116, 185, 255, 0.08);
    color: #3a7bd5;
    border: 1px solid rgba(116, 185, 255, 0.2);
}

.alert__dismiss {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    opacity: 0.5;
    cursor: pointer;
    font-size: 1.125rem;
    line-height: 1;
    padding: 0;
    flex-shrink: 0;
}

.alert__dismiss:hover { opacity: 1; }

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 56px 24px;
}

.empty-state__icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--surface-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.5rem;
    color: var(--text-tertiary);
}

.empty-state__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state__text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    max-width: 420px;
    margin: 0 auto;
    line-height: 1.6;
}

/* --- Phase List --- */
.phase-list { list-style: none; margin-top: 24px; }

.phase-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.875rem;
}

.phase-item:last-child { border-bottom: none; }

.phase-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-medium);
    flex-shrink: 0;
}

.phase-dot--active { background: var(--brand-purple); box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15); }
.phase-dot--done { background: var(--success); }

.phase-item__label { color: var(--text-secondary); }
.phase-item__label--active { color: var(--text-primary); font-weight: 600; }

/* --- Login Layout --- */
.login-layout {
    min-height: 100vh;
    display: flex;
}

.login-panel {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.login-panel--form {
    background: var(--surface-primary);
    max-width: 560px;
}

.login-panel--brand {
    background: linear-gradient(160deg, #2D3047 0%, #3D405B 50%, #6C5CE7 100%);
    position: relative;
    overflow: hidden;
}

.login-panel--brand::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.25) 0%, transparent 70%);
    pointer-events: none;
}

.login-panel--brand::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(162, 155, 254, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.login-brand-content {
    position: relative;
    z-index: 1;
    color: var(--text-inverse);
    max-width: 420px;
}

.login-brand-content h1 {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 16px;
}

.login-brand-content p {
    font-size: 1.0625rem;
    opacity: 0.75;
    line-height: 1.7;
}

/* --- Login Brand Rotator --- */
.login-brand-rotator {
    position: relative;
    min-height: 220px;
}

.login-brand-slide {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    pointer-events: none;
}

.login-brand-slide--active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    position: relative;
}

.login-brand-slide__label {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.85);
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 100px;
    margin-bottom: 20px;
}

.login-brand-dots {
    display: flex;
    gap: 8px;
    margin-top: 32px;
}

.login-brand-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    border: none;
    padding: 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.login-brand-dot:hover {
    background: rgba(255, 255, 255, 0.5);
}

.login-brand-dot--active {
    background: rgba(255, 255, 255, 0.9);
    width: 24px;
    border-radius: 4px;
}

.login-form-wrap {
    width: 100%;
    max-width: 380px;
}

.login-form-wrap__logo {
    margin-bottom: 40px;
}

.login-form-wrap__logo img { height: 36px; }

.login-form-wrap__heading {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.login-form-wrap__subheading {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.5;
}

/* --- Footer --- */
.app-footer {
    padding: 20px 24px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

/* --- Grid Helpers --- */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* --- SVG Icons (inline) --- */
.icon {
    width: 18px;
    height: 18px;
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .app-topbar { padding: 0 16px; }

    .app-topbar__user span { display: none; }

    .app-main { padding: 24px 16px; }

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

    .grid-2 { grid-template-columns: 1fr; }

    .login-panel--brand { display: none; }

    .login-panel--form { max-width: 100%; }

    .page-header__title { font-size: 1.375rem; }
}

@media (max-width: 480px) {
    .stat-grid { grid-template-columns: 1fr; }

    .app-topbar__link span { display: none; }

    .login-form-wrap { padding: 0 8px; }
}