/* ============================================
   LAYOUT — App Shell, Header, Flow Bar, Grid
   ============================================ */

.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ─── Header ────────────────────────────────────────────── */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--color-white);
    display: flex;
    align-items: center;
    padding: 0 var(--space-lg);
    gap: var(--space-md);
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.header-logo {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-white);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    flex-shrink: 0;
    transition: opacity var(--transition-fast);
    letter-spacing: -0.01em;
    margin-right: var(--space-lg);
}

.header-logo:hover {
    color: var(--color-white);
    opacity: 0.85;
}

.header-logo .logo-icon {
    width: 26px;
    height: 26px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

/* ─── Header Search ─────────────────────────────────────── */
.header-search {
    flex: 1;
    max-width: 400px;
    margin: 0 var(--space-md);
    position: relative;
}

/* Predictive search dropdown */
.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 4px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 30px rgba(0,0,0,0.18), 0 2px 8px rgba(0,0,0,0.08);
    z-index: 1000;
    max-height: 340px;
    overflow-y: auto;
    border: 1px solid var(--color-border);
}

.search-dropdown:empty { display: none; }

.search-dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    cursor: pointer;
    transition: background 0.12s;
    border-bottom: 1px solid var(--color-border-light);
}
.search-dropdown-item:last-child { border-bottom: none; }
.search-dropdown-item:hover,
.search-dropdown-item.active {
    background: var(--color-bg-alt);
}
.search-dropdown-item-avatar {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--color-primary); color: white;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.75rem; flex-shrink: 0;
}
.search-dropdown-item-info { flex: 1; min-width: 0; }
.search-dropdown-item-name {
    font-weight: 600; font-size: 0.875rem;
    color: var(--color-text); white-space: nowrap;
    overflow: hidden; text-overflow: ellipsis;
}
.search-dropdown-item-meta {
    font-size: 0.75rem; color: var(--color-text-muted);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.search-dropdown-item-badge {
    font-size: 0.65rem; font-weight: 600; text-transform: uppercase;
    padding: 2px 8px; border-radius: var(--radius-full);
    white-space: nowrap; flex-shrink: 0;
}
.search-dropdown-footer {
    padding: 8px 14px; text-align: center;
    font-size: 0.8rem; color: var(--color-text-muted);
    border-top: 1px solid var(--color-border-light);
    cursor: pointer;
}
.search-dropdown-footer:hover { background: var(--color-bg-alt); }
.search-dropdown-empty {
    padding: 16px; text-align: center;
    font-size: 0.85rem; color: var(--color-text-muted);
}

.header-search-input {
    width: 100%;
    padding: 9px 16px 9px 38px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: 0.875rem;
    background: rgba(255,255,255,0.08);
    color: var(--color-white);
    outline: none;
    transition: all var(--transition-normal);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.5)' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='M21 21l-4.35-4.35'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 12px center;
}

.header-search-input:focus {
    border-color: rgba(255,255,255,0.4);
    background-color: rgba(255,255,255,0.15);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.08);
}

.header-search-input::placeholder {
    color: rgba(255,255,255,0.45);
}

/* ─── Header Nav (LEFT side, after logo) ───────────────── */
.header-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 0 0 auto;
}

.header-nav .nav-item {
    padding: 7px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255,255,255,0.75);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 7px;
    text-decoration: none;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
}

.header-nav .nav-item:hover {
    background: rgba(255,255,255,0.16);
    border-color: rgba(255,255,255,0.25);
    color: var(--color-white);
}

.header-nav .nav-item.active {
    background: rgba(217, 119, 6, 0.25);
    border-color: rgba(217, 119, 6, 0.45);
    color: #fbbf24;
    font-weight: 600;
}

.header-nav .nav-icon {
    opacity: 0.8;
    flex-shrink: 0;
}

.header-nav .nav-item.active .nav-icon {
    opacity: 1;
}

/* ─── Header Spacer (pushes right-side items) ──────────── */
.header-spacer {
    flex: 1 1 auto;
    min-width: var(--space-md);
}

/* ─── App Version Badge ────────────────────────────────── */
.app-version-badge {
    font-size: 0.7rem;
    font-weight: 700;
    color: rgba(255,255,255,0.85);
    letter-spacing: 0.5px;
    padding: 2px 8px;
    user-select: none;
    flex-shrink: 0;
}

/* ─── Settings Gear (far right) ────────────────────────── */
.header-settings-btn {
    padding: 7px;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    flex-shrink: 0;
    text-decoration: none;
}

.header-settings-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--color-white);
}

.header-settings-btn .nav-icon {
    opacity: 0.7;
}

.header-settings-btn.active {
    background: rgba(217, 119, 6, 0.25);
    border-color: rgba(217, 119, 6, 0.45);
    color: #fbbf24;
}

.header-settings-btn.active .nav-icon {
    opacity: 1;
}

/* ─── Header Actions ────────────────────────────────────── */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.lang-toggle-btn {
    font-size: 0.7rem !important;
    padding: 3px 10px !important;
    font-weight: 700 !important;
    letter-spacing: 0.5px;
    color: rgba(255,255,255,0.7) !important;
    border: 1px solid rgba(255,255,255,0.25) !important;
    border-radius: 100px !important;
    background: transparent !important;
    transition: all var(--transition-fast) !important;
}

.lang-toggle-btn:hover {
    color: var(--color-white) !important;
    border-color: rgba(255,255,255,0.5) !important;
    background: rgba(255,255,255,0.1) !important;
}

/* ─── Main Content Area ─────────────────────────────────── */
.main-content {
    flex: 1;
    padding: var(--space-xl) var(--space-lg);
    max-width: var(--content-max-width);
    margin: 0 auto;
    width: 100%;
}

/* ─── Upload: New Analysis Bar ─────────────────────────── */
.upload-new-analysis-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: 16px 24px;
    margin-bottom: var(--space-xl);
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.06) 0%, rgba(217, 119, 6, 0.06) 100%);
    border: 2px solid rgba(30, 41, 59, 0.15);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px rgba(30, 41, 59, 0.06);
}

.upload-new-analysis-bar .btn {
    padding: 10px 24px !important;
    font-size: 0.9375rem !important;
    font-weight: 600 !important;
    white-space: nowrap;
}

.upload-new-analysis-text {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 600;
}

/* ─── Page Header ───────────────────────────────────────── */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}
.page-header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
    padding-top: 4px;
}

.page-header h1 {
    margin-bottom: 6px;
}

.page-header .page-subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
    margin-bottom: 0;
}

/* ─── Grid Layouts ──────────────────────────────────────── */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.grid-5 {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-lg);
}

.grid-6 {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-md);
}

/* ─── Flow Context Bar (patient banner + wizard) ────────── */
.flow-context-bar {
    position: sticky;
    top: var(--header-height);
    z-index: 99;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.flow-section-title {
    text-align: center;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
    padding: 14px 0 4px;
    letter-spacing: -0.02em;
}

/* ─── Flow Tabs (Test & Analyze | Treat) ─────────────────── */
.flow-tabs {
    display: flex;
    align-items: stretch;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
}

.flow-tabs.hidden { display: none; }

.flow-tab-btn {
    flex: 1;
    padding: 10px 20px;
    border: none;
    background: transparent;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    border-bottom: 3px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.flow-tab-btn:hover:not(:disabled) {
    color: var(--color-accent);
    background: rgba(217, 119, 6, 0.04);
}

.flow-tab-btn.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
    font-weight: 600;
}

.flow-tab-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.flow-tab-btn .tab-icon {
    font-size: 1rem;
}

/* ─── Flow Action Bar (inline with patient banner) ─── */
.flow-action-bar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    margin-left: auto;
    flex-shrink: 0;
}

.flow-action-bar.hidden {
    display: none;
}

.flow-action-bar .edit-status {
    margin-right: auto;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.flow-action-bar .edit-status.dirty {
    color: var(--color-suboptimal);
    font-weight: 500;
}

/* ─── Patient Banner ────────────────────────────────────── */
.patient-banner {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 12px var(--space-lg);
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}

.patient-banner--empty .patient-banner-name,
.patient-banner--empty .patient-banner-detail {
    opacity: 0.35;
}

.patient-banner-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--color-primary);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-white);
    transition: all var(--transition-fast);
}

.patient-banner--empty .patient-banner-avatar {
    background: var(--color-border);
    color: var(--color-text-muted);
}

.patient-banner-avatar.has-initials {
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.patient-banner-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.patient-banner-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-text);
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.patient-banner-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.patient-banner-detail {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.patient-banner-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--color-text-muted);
    flex-shrink: 0;
}

/* ─── Dashboard Hero CTA ────────────────────────────────── */
.dashboard-hero {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
    margin-bottom: var(--space-xl);
    background: linear-gradient(160deg, var(--color-bg-alt) 0%, rgba(30, 41, 59, 0.04) 50%, rgba(217, 119, 6, 0.04) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.dashboard-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(217, 119, 6, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.dashboard-hero-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    filter: grayscale(0.1);
}

.dashboard-hero-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    letter-spacing: -0.03em;
}

.dashboard-hero-subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
    margin-bottom: var(--space-xl);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.dashboard-hero .btn-primary {
    padding: 14px 36px;
    font-size: 1rem;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 14px rgba(30, 41, 59, 0.2);
    transition: all var(--transition-fast);
}

.dashboard-hero .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(30, 41, 59, 0.25);
}

/* ─── Compact Dashboard Hero (60% width) ─────────────────── */
.dashboard-hero--compact {
    max-width: 60%;
    margin-left: auto;
    margin-right: auto;
}

/* ─── Section Dividers ──────────────────────────────────── */
.section {
    margin-bottom: var(--space-2xl);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.section-header h2 {
    font-size: 1.375rem;
}

.section-header h3 {
    font-size: 1.125rem;
}

.section-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

/* ─── Empty State ───────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
    color: var(--color-text-muted);
}

.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.4;
}

.empty-state p {
    color: var(--color-text-muted);
    max-width: 400px;
    margin: 0 auto var(--space-lg);
}

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-5 { grid-template-columns: repeat(3, 1fr); }
    .grid-6 { grid-template-columns: repeat(3, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .header {
        padding: 0 var(--space-md);
        flex-wrap: wrap;
        height: auto;
        min-height: var(--header-height);
        gap: var(--space-sm);
    }

    .header-logo span {
        display: none;
    }

    .header-search {
        flex: 1;
        max-width: none;
        margin: 0;
        order: 10;
    }

    .header-spacer { display: none; }

    .header-nav .nav-item {
        padding: 5px 8px;
        font-size: 0.75rem;
    }

    .header-nav .nav-item span {
        display: none;
    }

    .header-actions { order: 8; }
    .header-settings-btn { order: 9; }

    .flow-action-bar {
        padding: 8px var(--space-md);
        flex-wrap: wrap;
        gap: 8px;
    }

    .main-content {
        padding: var(--space-lg) var(--space-md);
    }

    .grid-2, .grid-3, .grid-4, .grid-5, .grid-6 {
        grid-template-columns: 1fr;
    }

    .patient-banner {
        padding: 10px var(--space-md);
    }

    .dashboard-hero {
        padding: var(--space-xl) var(--space-md);
    }

    .dashboard-hero--compact {
        max-width: 100%;
    }

    .dashboard-hero-title {
        font-size: 1.375rem;
    }
}