/* ==========================================================================
   PlanScan • Lean, Centered, Minimalist Architectural System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg-base: #0D1117;
    --bg-surface: #161B22;
    --bg-surface-elevated: #21262D;
    --bg-surface-hover: #30363D;
    --border-subtle: #30363D;
    --border-hover: #8B949E;

    --text-primary: #F0F6FC;
    --text-secondary: #8B949E;
    --text-muted: #6E7681;

    --brand-blue: #238636; /* Clean emerald/tech green or calm blue */
    --brand-blue-btn: #1F6FEB;
    --brand-blue-hover: #388BFD;

    --color-success: #2EA043;
    --color-success-bg: rgba(46, 160, 67, 0.15);
    --color-warning: #D29922;
    --color-warning-bg: rgba(210, 153, 34, 0.15);
    --color-danger: #F85149;
    --color-danger-bg: rgba(248, 81, 73, 0.15);

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    --transition: 0.15s ease;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 0.875rem;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* ── Centered Lean Layout Containers (NO full-screen stretching) ──────────── */
.app-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 1.25rem;
    width: 100%;
}

.app-container-wide {
    max-width: 1020px;
    margin: 0 auto;
    padding: 0 1.25rem;
    width: 100%;
}

/* ── Lean Navigation ─────────────────────────────────────────────────────── */
.app-navbar {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary) !important;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.brand-logo-img {
    width: 26px;
    height: 26px;
    border-radius: 6px;
    object-fit: cover;
    border: 1px solid rgba(56, 139, 253, 0.4);
}

.nav-link-custom {
    color: var(--text-secondary) !important;
    font-weight: 500;
    font-size: 0.8125rem;
    padding: 0.35rem 0.65rem !important;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: color var(--transition);
}

.nav-link-custom:hover {
    color: var(--text-primary) !important;
}

.nav-link-custom.active {
    color: var(--text-primary) !important;
    background-color: var(--bg-surface-elevated);
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #2EA043;
}

/* ── Minimalist Cards ────────────────────────────────────────────────────── */
.card-lean {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.card-header-lean {
    padding: 0.85rem 1.15rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title-lean {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.card-body-lean {
    padding: 1.15rem;
}

/* ── Compact Upload Dropzone ─────────────────────────────────────────────── */
.upload-dropzone {
    border: 1.5px dashed var(--border-subtle);
    background-color: rgba(255, 255, 255, 0.01);
    border-radius: var(--radius-md);
    padding: 1.75rem 1.25rem;
    text-align: center;
    position: relative;
    cursor: pointer;
    transition: border-color var(--transition), background-color var(--transition);
}

.upload-dropzone:hover,
.upload-dropzone.drag-active {
    border-color: var(--brand-blue-btn);
    background-color: rgba(31, 111, 235, 0.04);
}

.upload-icon-circle {
    width: 36px;
    height: 36px;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #58A6FF;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.file-hidden-input {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

/* ── Inline Stats Summary (Minimalist & Compact) ─────────────────────────── */
.stats-strip {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.65rem 1rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    font-size: 0.8125rem;
}

.stat-item {
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.stat-divider {
    color: var(--border-subtle);
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn-lean-primary {
    background-color: var(--brand-blue-btn);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    font-weight: 500;
    font-size: 0.8125rem;
    padding: 0.45rem 0.95rem;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition);
}

.btn-lean-primary:hover {
    background-color: var(--brand-blue-hover);
    color: #ffffff;
}

.btn-lean-secondary {
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.8125rem;
    padding: 0.45rem 0.95rem;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition);
}

.btn-lean-secondary:hover {
    background-color: var(--bg-surface-hover);
    color: #ffffff;
}

/* ── Status Pills ────────────────────────────────────────────────────────── */
.badge-status {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
}

.badge-status.completed {
    background-color: var(--color-success-bg);
    color: #3FB950;
    border: 1px solid rgba(46, 160, 67, 0.3);
}

.badge-status.processing {
    background-color: var(--color-warning-bg);
    color: #D29922;
    border: 1px solid rgba(210, 153, 34, 0.3);
}

.badge-status.pending {
    background-color: rgba(110, 118, 129, 0.15);
    color: #8B949E;
    border: 1px solid rgba(110, 118, 129, 0.3);
}

.badge-status.failed {
    background-color: var(--color-danger-bg);
    color: #F85149;
    border: 1px solid rgba(248, 81, 73, 0.3);
}

/* ── Clean Lean Table ────────────────────────────────────────────────────── */
.table-lean {
    width: 100%;
    margin-bottom: 0;
    border-collapse: collapse;
}

.table-lean th {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94A3B8; /* High-contrast slate-400 (WCAG AAA) */
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    background-color: rgba(255, 255, 255, 0.02);
}

.table-lean td {
    padding: 0.75rem 1rem;
    font-size: 0.8125rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-subtle);
    vertical-align: middle;
}

.table-lean tbody tr {
    transition: background-color var(--transition);
}

.table-lean tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.table-lean tbody tr:last-child td {
    border-bottom: none;
}

/* ── Segmented Control ───────────────────────────────────────────────────── */
.segmented-control {
    display: inline-flex;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 2px;
    gap: 2px;
}

.segmented-btn {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.65rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

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

.segmented-btn.active {
    background-color: var(--brand-blue-btn);
    color: #ffffff;
}

/* ── Plan Viewer Frame (Aspect-Fitted, Eliminates Black Void) ─────────────── */
.plan-frame {
    background-color: #05080C;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0 auto;
    position: relative;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.plan-frame:hover {
    border-color: rgba(56, 139, 253, 0.45);
    box-shadow: 0 4px 28px rgba(0, 0, 0, 0.6);
}

.plan-image-viewer {
    width: 100%;
    height: auto;
    max-height: 80vh;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    background: #000;
}

/* ── High-Contrast Confidence & Quality Badges (WCAG AAA Compliant) ──────── */
.confidence-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.15rem 0.55rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
    min-width: 46px;
    box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.2);
}

.confidence-pill.high {
    background: rgba(46, 160, 67, 0.22);
    color: #7EE787;
    border: 1px solid rgba(46, 160, 67, 0.45);
}

.confidence-pill.med {
    background: rgba(210, 153, 34, 0.22);
    color: #F2CC60;
    border: 1px solid rgba(210, 153, 34, 0.45);
}

.confidence-pill.low {
    background: rgba(248, 81, 73, 0.22);
    color: #FFA198;
    border: 1px solid rgba(248, 81, 73, 0.45);
}

/* ── Wall Tag Badges ─────────────────────────────────────────────────────── */
.tag-badge {
    display: inline-block;
    min-width: 22px;
    height: 22px;
    line-height: 20px;
    text-align: center;
    font-weight: 600;
    font-size: 0.75rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.tag-badge.tag-A { background: rgba(248, 81, 73, 0.15); color: #FFA198; border-color: rgba(248, 81, 73, 0.3); }
.tag-badge.tag-B { background: rgba(139, 148, 158, 0.15); color: #E6EDF3; border-color: rgba(139, 148, 158, 0.3); }
.tag-badge.tag-C { background: rgba(88, 166, 255, 0.15); color: #79C0FF; border-color: rgba(88, 166, 255, 0.3); }
.tag-badge.tag-D { background: rgba(210, 153, 34, 0.15); color: #E3B341; border-color: rgba(210, 153, 34, 0.3); }
.tag-badge.tag-E { background: rgba(187, 128, 179, 0.15); color: #D2A8FF; border-color: rgba(187, 128, 179, 0.3); }
.tag-badge.tag-F { background: rgba(56, 139, 253, 0.15); color: #A5D6FF; border-color: rgba(56, 139, 253, 0.3); }

/* ── Minimalist Loading Overlay ─────────────────────────────────────────── */
.lean-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.lean-overlay-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    text-align: center;
    max-width: 320px;
}

/* ── Landing Page ────────────────────────────────────────────────────────── */

/* Hero Section */
.landing-hero {
    position: relative;
    overflow: hidden;
    background: var(--bg-base);
    border-bottom: 1px solid var(--border-subtle);
}

.landing-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(31, 111, 235, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(31, 111, 235, 0.06) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

.landing-hero-glow {
    position: absolute;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(31, 111, 235, 0.18) 0%, transparent 70%);
    pointer-events: none;
}

.landing-headline {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.landing-headline-accent {
    background: linear-gradient(135deg, #58A6FF 0%, #388BFD 40%, #A78BFA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

/* Hero stat pills */
.hero-stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.85rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Hero buttons */
.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.5rem;
    background: var(--brand-blue-btn);
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: none;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 0 20px rgba(31, 111, 235, 0.35);
}

.btn-hero-primary:hover {
    background: var(--brand-blue-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 0 30px rgba(31, 111, 235, 0.5);
}

.btn-hero-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.5rem;
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: 1px solid var(--border-subtle);
    transition: background-color var(--transition), transform var(--transition);
}

.btn-hero-secondary:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* Section layout */
.landing-section {
    padding: 5rem 0;
}

.landing-section-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #58A6FF;
    margin-bottom: 0.5rem;
}

.landing-section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    margin-bottom: 0;
}

/* How It Works Steps */
.how-step {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    position: relative;
    transition: border-color var(--transition), transform var(--transition);
}

.how-step:hover {
    border-color: rgba(31, 111, 235, 0.4);
    transform: translateY(-3px);
}

.how-step-number {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    font-family: monospace;
}

.how-step-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(31, 111, 235, 0.1);
    border: 1px solid rgba(31, 111, 235, 0.25);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: #58A6FF;
    margin-bottom: 1rem;
}

.how-step-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.how-step-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Feature Cards */
.feature-card {
    padding: 1.5rem;
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    height: 100%;
    transition: border-color var(--transition), transform var(--transition);
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.feature-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-bottom: 0.85rem;
}

.feature-card-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.feature-card-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Takeoff items */
.takeoff-item {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

/* Takeoff Preview Card */
.takeoff-preview-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.takeoff-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.15rem;
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(255,255,255,0.02);
}

.takeoff-preview-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.takeoff-preview-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.15rem;
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.875rem;
    transition: background-color var(--transition);
}

.takeoff-preview-row:hover {
    background: rgba(255,255,255,0.02);
}

/* Tech badges */
.tech-badge {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
}

.tech-badge-divider {
    color: var(--border-subtle);
    font-size: 1.2rem;
}

/* CTA Banner */
.landing-cta-banner {
    position: relative;
    overflow: hidden;
    padding: 5rem 0;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
}

.landing-cta-glow {
    position: absolute;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    height: 300px;
    background: radial-gradient(ellipse, rgba(31, 111, 235, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.landing-cta-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.app-footer {
    border-top: 1px solid var(--border-subtle);
    padding: 1rem 0;
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: auto;
}