/* BlackData — understated, professional consultancy aesthetic */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
    --bd-ink:       #0f172a;
    --bd-slate:     #334155;
    --bd-muted:     #64748b;
    --bd-line:      #e2e8f0;
    --bd-line-2:    #cbd5e1;
    --bd-soft:      #f8fafc;
    --bd-paper:     #ffffff;

    --bd-accent:        #0f766e;
    --bd-accent-hover:  #0d655e;
    --bd-accent-soft:   #ccfbf1;
    --bd-accent-deep:   #134e4a;

    --shadow-sm:   0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-md:   0 4px 12px -4px rgba(15, 23, 42, 0.08), 0 1px 3px rgba(15, 23, 42, 0.04);
    --shadow-lg:   0 20px 40px -20px rgba(15, 23, 42, 0.18);
    --radius-sm:  6px;
    --radius-md:  10px;
    --radius-lg:  14px;
    --radius-xl:  18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    background-color: var(--bd-paper);
    color: var(--bd-slate);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    color: var(--bd-ink);
    letter-spacing: -0.01em;
    line-height: 1.25;
}

p { color: var(--bd-slate); }

a { text-decoration: none; }

.tech-font {
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
    letter-spacing: 0.01em;
}

/* ---------------- Background ambience ---------------- */
.subtle-grid {
    background-size: 32px 32px;
    background-image:
        linear-gradient(to right, rgba(148, 163, 184, 0.10) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(148, 163, 184, 0.10) 1px, transparent 1px);
    mask-image: radial-gradient(ellipse at 50% 0%, #000 40%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 40%, transparent 80%);
}

.ambient-wash {
    position: absolute;
    width: 900px;
    height: 600px;
    background: radial-gradient(circle at 30% 0%, rgba(15, 118, 110, 0.07), transparent 55%),
                radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.05), transparent 60%);
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
    filter: blur(40px);
}

/* ---------------- Navigation ---------------- */
.nav-bar {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--bd-line);
}

.nav-link {
    color: var(--bd-slate);
    position: relative;
    padding: 6px 0;
    transition: color 0.2s ease;
}
.nav-link:hover { color: var(--bd-accent); }
.nav-link::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 2px;
    background: var(--bd-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.22s ease;
    border-radius: 2px;
}
.nav-link:hover::after { transform: scaleX(1); }

/* ---------------- Buttons ---------------- */
.btn-primary {
    background: var(--bd-accent);
    color: #fff;
    border: 1px solid var(--bd-accent);
    border-radius: var(--radius-md);
    transition: background-color 0.18s ease,
                border-color 0.18s ease,
                transform 0.18s ease,
                box-shadow 0.18s ease;
    box-shadow: 0 1px 2px rgba(15, 118, 110, 0.25),
                inset 0 1px 0 rgba(255,255,255,0.08);
    font-family: 'Inter', sans-serif;
}
.btn-primary:hover {
    background: var(--bd-accent-hover);
    border-color: var(--bd-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px -6px rgba(15, 118, 110, 0.45);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
    background: #fff;
    color: var(--bd-ink);
    border: 1px solid var(--bd-line-2);
    border-radius: var(--radius-md);
    transition: all 0.18s ease;
    font-family: 'Inter', sans-serif;
}
.btn-outline:hover {
    border-color: var(--bd-accent);
    color: var(--bd-accent);
    background: var(--bd-soft);
    transform: translateY(-1px);
}
.btn-outline:active { transform: translateY(0); }

.btn-accent {
    background: linear-gradient(135deg, #0f766e 0%, #115e59 100%);
    color: #fff;
    border: 1px solid #0d655e;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px -4px rgba(15, 118, 110, 0.5);
    font-family: 'Inter', sans-serif;
}
.btn-accent:hover {
    filter: brightness(1.05);
    transform: translateY(-1px);
    box-shadow: 0 10px 24px -8px rgba(15, 118, 110, 0.55);
}

/* ---------------- Form inputs ---------------- */
.field-input {
    width: 100%;
    background: #fff;
    border: 1px solid var(--bd-line-2);
    border-radius: var(--radius-md);
    padding: 0.8rem 1rem;
    color: var(--bd-ink);
    font-size: 0.95rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
    font-family: 'Inter', sans-serif;
}
.field-input::placeholder { color: #94a3b8; }
.field-input:focus {
    outline: none;
    border-color: var(--bd-accent);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
    background: #fff;
}

input:disabled {
    background-color: var(--bd-soft) !important;
    color: var(--bd-muted) !important;
    cursor: not-allowed !important;
    opacity: 0.7;
}

/* ---------------- Service cards (overview grid) ---------------- */
.service-card {
    background: #fff;
    border: 1px solid var(--bd-line);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.service-card:hover {
    border-color: var(--bd-line-2);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* ---------------- Capability directory cards ---------------- */
.cap-card {
    background: #fff;
    border: 1px solid var(--bd-line);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    position: relative;
}
.cap-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(15, 118, 110, 0.25), transparent);
    opacity: 0;
    transition: opacity 0.2s ease;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.cap-card:hover {
    border-color: #cbd5e1;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.cap-card:hover::after { opacity: 1; }

.cap-icon {
    width: 42px; height: 42px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    border: 1px solid;
    transition: transform 0.2s ease;
}
.cap-card:hover .cap-icon { transform: translateY(-1px); }

/* ---------------- About chips ---------------- */
.about-chip {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.9rem 1rem;
    border: 1px solid var(--bd-line);
    border-radius: var(--radius-md);
    background: #fff;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.about-chip:hover {
    border-color: var(--bd-line-2);
    box-shadow: var(--shadow-sm);
}
.chip-icon {
    width: 30px; height: 30px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    border: 1px solid transparent;
}

/* ---------------- Fade animation ---------------- */
.fade-in {
    animation: fadeIn 0.35s ease both;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------------- Responsive polish ---------------- */
@media (max-width: 640px) {
    .service-card { padding: 1.35rem; }
    .cap-card { padding: 1.1rem; }
}

/* ---------------- Reduced motion ---------------- */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}