/* ============================================================
   HYDROSTACK — PREMIUM BRUTALIST INDUSTRIAL CSS
   v2.0 | Designed for Nepal's Hydro-Infrastructure Inspectors
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@400;600;700;900&family=IBM+Plex+Mono:wght@400;500&family=Barlow:wght@300;400;500;600&display=swap');

/* ── TOKENS ─────────────────────────────────────────────── */
:root {
    --bg:           #080A0C;
    --bg-2:         #0F1215;
    --bg-3:         #161B20;
    --surface:      #1A2028;
    --surface-2:    #222A33;
    --border:       #2A3540;
    --border-lit:   #3A4F60;
    --text:         #E8EDF2;
    --text-2:       #8FA3B2;
    --text-3:       #556A7A;
    --amber:        #F5A623;
    --amber-dim:    #B87A18;
    --amber-glow:   rgba(245, 166, 35, 0.12);
    --amber-glow-2: rgba(245, 166, 35, 0.06);
    --danger:       #E05A3A;
    --ice:          #A8D4E8;
    --green:        #4CAF8A;
    --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
    --font-body:    'Barlow', system-ui, sans-serif;
    --font-mono:    'IBM Plex Mono', 'Courier New', monospace;
    --radius:       3px;
    --radius-lg:    6px;
    --t-fast:       0.15s ease;
    --t-mid:        0.25s ease;
}

/* ── RESET ───────────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0; padding: 0; box-sizing: border-box;
}
html { scroll-behavior: smooth; }
body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Structural grid lines — industrial blueprint feel */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(245,166,35,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245,166,35,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 28px;
    position: relative;
}

a { text-decoration: none; color: inherit; }

/* ── NAVBAR ──────────────────────────────────────────────── */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 28px;
    height: 64px;
    background: rgba(8, 10, 12, 0.92);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

/* Left-edge accent strip */
nav::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--amber);
}

.logo {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.6rem;
    letter-spacing: 0.04em;
    color: var(--text);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    display: inline-block;
    width: 8px; height: 8px;
    background: var(--amber);
    border-radius: 50%;
    animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.4; transform: scale(0.7); }
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-2);
    padding: 8px 16px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.nav-links a:hover {
    color: var(--amber);
    border-color: var(--border-lit);
    background: var(--amber-glow-2);
}
.nav-links a.btn-outline {
    color: var(--amber) !important;
    border-color: var(--amber-dim);
    background: var(--amber-glow-2);
}
.nav-links a.btn-outline:hover {
    background: var(--amber-glow);
    border-color: var(--amber);
    box-shadow: 0 0 14px var(--amber-glow);
}

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn-primary {
    display: inline-block;
    background: var(--amber);
    color: #000;
    padding: 13px 28px;
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
    border: 2px solid var(--amber);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.08);
    opacity: 0;
    transition: opacity var(--t-fast);
}
.btn-primary:hover {
    background: #E8960F;
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(245,166,35,0.3);
}
.btn-primary:hover::after { opacity: 1; }
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--text);
    padding: 13px 28px;
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border: 2px solid var(--border-lit);
    transition: border-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
    cursor: pointer;
}
.btn-secondary:hover {
    border-color: var(--ice);
    color: var(--ice);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--amber) !important;
    border: 1px solid var(--amber-dim);
    padding: 8px 18px;
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: all var(--t-fast);
}
.btn-outline:hover {
    background: var(--amber-glow);
    border-color: var(--amber);
    box-shadow: 0 0 14px var(--amber-glow);
}

/* ── BADGE ───────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(245,166,35,0.08);
    color: var(--amber);
    padding: 7px 14px;
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border: 1px solid rgba(245,166,35,0.25);
    margin-bottom: 24px;
}
.badge::before {
    content: '';
    display: inline-block;
    width: 6px; height: 6px;
    background: var(--amber);
    border-radius: 50%;
}

/* ── HERO ────────────────────────────────────────────────── */
.hero {
    position: relative;
    padding: 96px 0 80px;
    overflow: hidden;
}

/* Diagonal amber sweep */
.hero::before {
    content: '';
    position: absolute;
    top: -120px; right: -200px;
    width: 700px; height: 700px;
    background: radial-gradient(ellipse, rgba(245,166,35,0.06) 0%, transparent 65%);
    pointer-events: none;
}
/* Bottom edge rule */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 28px; right: 28px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-lit) 20%, var(--border-lit) 80%, transparent);
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 5.2rem);
    font-weight: 900;
    line-height: 1.0;
    letter-spacing: -0.01em;
    text-transform: uppercase;
    margin-bottom: 24px;
}
.highlight { color: var(--amber); }

.hero p {
    font-size: 1.1rem;
    color: var(--text-2);
    font-weight: 300;
    letter-spacing: 0.01em;
}

.cta-group {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 36px;
}

/* Portal cards in hero */
.hero .portal-grid {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 56px;
}

/* Hero portal cards (inline styles get overridden by these) */
.hero .portal-card {
    background: var(--surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    width: 300px;
    text-align: left;
    transition: transform var(--t-mid), box-shadow var(--t-mid), border-color var(--t-mid);
    position: relative;
    overflow: hidden;
}
.hero .portal-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--amber);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--t-mid);
}
.hero .portal-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}
.hero .portal-card:hover::before { transform: scaleX(1); }

/* Corner coordinate mark — industrial detail */
.portal-card::after {
    content: attr(data-id);
    position: absolute;
    bottom: 12px; right: 14px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-3);
    letter-spacing: 0.05em;
}

.portal-card-amber { border: 1px solid rgba(245,166,35,0.35) !important; }
.portal-card-slate { border: 1px solid var(--border) !important; }
.portal-card-amber:hover { border-color: var(--amber) !important; box-shadow: 0 0 30px rgba(245,166,35,0.1), 0 20px 50px rgba(0,0,0,0.4) !important; }
.portal-card-slate:hover { border-color: var(--border-lit) !important; }

.portal-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 10px;
}
.portal-card p {
    font-size: 0.88rem;
    color: var(--text-2);
    margin-bottom: 24px;
    line-height: 1.55;
}

/* Spec line — role meta tag */
.portal-card .role-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-3);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 18px;
}
.portal-card .role-tag::before {
    content: '';
    display: inline-block;
    width: 18px; height: 1px;
    background: var(--border-lit);
}

/* ── FEATURES ────────────────────────────────────────────── */
.features {
    padding: 96px 0;
    background: var(--bg-2);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    position: relative;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.9rem, 3.5vw, 2.8rem);
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 64px;
    position: relative;
}
.section-title::after {
    content: '';
    display: block;
    width: 48px; height: 3px;
    background: var(--amber);
    margin: 16px auto 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2px;
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card {
    background: var(--bg-3);
    padding: 36px 30px;
    border: none;
    border-radius: 0;
    transition: background var(--t-mid);
    position: relative;
}
.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 3px;
    background: var(--amber);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--t-mid);
}
.card:hover { background: var(--surface); }
.card:hover::before { transform: scaleY(1); }

.card .card-icon {
    font-size: 1.6rem;
    margin-bottom: 16px;
    display: block;
}
.card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--amber);
    margin-bottom: 12px;
}
.card p {
    color: var(--text-2);
    font-size: 0.92rem;
    line-height: 1.65;
    font-weight: 300;
}

/* ── HOW IT WORKS ────────────────────────────────────────── */
.how-it-works {
    padding: 100px 0;
    position: relative;
}

.steps {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    text-align: center;
    gap: 0;
    margin-top: 64px;
}

.step {
    flex: 1;
    max-width: 260px;
    padding: 0 20px;
    position: relative;
}

/* Connector line between steps */
.line-connect {
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, var(--border), var(--border-lit), var(--border));
    margin-top: 28px;
    flex: none;
    position: relative;
}
.line-connect::after {
    content: '›';
    position: absolute;
    top: -9px; left: 50%;
    transform: translateX(-50%);
    color: var(--amber);
    font-size: 0.9rem;
}

.step-number {
    width: 54px; height: 54px;
    background: var(--bg-3);
    color: var(--amber);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 0 auto 20px;
    border: 2px solid var(--border-lit);
    position: relative;
    transition: border-color var(--t-mid), box-shadow var(--t-mid), background var(--t-mid);
}
.step:hover .step-number {
    border-color: var(--amber);
    background: var(--surface);
    box-shadow: 0 0 20px var(--amber-glow), 0 0 40px var(--amber-glow-2);
}

.step h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 10px;
    color: var(--text);
}
.step p {
    font-size: 0.88rem;
    color: var(--text-2);
    font-weight: 300;
    line-height: 1.6;
}

/* ── CTA SECTION ─────────────────────────────────────────── */
.cta-section {
    padding: 100px 0;
    background: var(--bg-2);
    border-top: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    text-align: center;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(245,166,35,0.06) 0%, transparent 60%);
    pointer-events: none;
}
.cta-section h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 900;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.cta-section p {
    color: var(--text-2);
    font-size: 1.05rem;
    margin-bottom: 40px;
}

.text-center { text-align: center; }

/* ── STAT STRIP (optional trust signal row) ──────────────── */
.stat-strip {
    display: flex;
    justify-content: center;
    gap: 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-2);
    overflow-x: auto;
}
.stat-item {
    flex: 1;
    min-width: 140px;
    padding: 28px 24px;
    text-align: center;
    border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    color: var(--amber);
    line-height: 1;
    letter-spacing: 0.02em;
    display: block;
    margin-bottom: 6px;
}
.stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-3);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ── VALUE PROP BANNER ───────────────────────────────────── */
.value-banner {
    background: var(--surface);
    border: 1px solid var(--border-lit);
    border-left: 3px solid var(--amber);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    margin: 48px 0 0;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    max-width: 720px;
    margin: 56px auto 0;
}
.value-banner .vb-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.value-banner strong {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--amber);
    display: block;
    margin-bottom: 6px;
}
.value-banner p {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.6;
}

/* ── FOOTER ──────────────────────────────────────────────── */
footer {
    text-align: center;
    padding: 36px 0;
    border-top: 1px solid var(--border);
    position: relative;
}
footer p {
    font-size: 0.88rem;
    color: var(--text-3);
    font-weight: 300;
}
footer a {
    color: var(--text-3);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--t-fast);
}
footer a:hover { color: var(--amber); }

/* ── MOCKUP (legacy, now hidden in hero but kept) ──────────── */
.hero-image { display: none; }

/* ── SCROLL ENTRANCE ANIMATIONS ─────────────────────────── */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}
.hero .container > * {
    animation: fade-up 0.55s ease both;
}
.hero .container > *:nth-child(1) { animation-delay: 0.05s; }
.hero .container > *:nth-child(2) { animation-delay: 0.15s; }
.hero .container > *:nth-child(3) { animation-delay: 0.25s; }
.hero .container > *:nth-child(4) { animation-delay: 0.35s; }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 768px) {
    nav { padding: 0 16px; }
    .logo { font-size: 1.3rem; }
    .nav-links a:not(.btn-outline) { display: none; }

    .hero { padding: 72px 0 60px; }
    .hero h1 { font-size: 2.5rem; }

    .hero .portal-grid { flex-direction: column; align-items: center; }

    .steps { flex-direction: column; align-items: center; gap: 36px; }
    .line-connect { display: none; }

    .grid { grid-template-columns: 1fr; }
    .card::before { top: 0; left: 0; right: 0; bottom: auto; width: auto; height: 3px; transform: scaleX(0); transform-origin: left; }
    .card:hover::before { transform: scaleX(1); }

    .stat-strip { flex-wrap: wrap; }
    .stat-item { min-width: calc(50% - 1px); }

    .value-banner { flex-direction: column; gap: 12px; margin: 36px 16px 0; }
    .cta-group { flex-direction: column; }
}

@media (max-width: 480px) {
    .hero .portal-card { width: 100% !important; max-width: 340px; }
    .container { padding: 0 16px; }
}