/* ==========================================================================
   PeridotX marketing site — design system
   Inspired by the Sierra "Startup" template: dark gradient hero, bold
   condensed headings, blue accent, clean card grids, alternating light/dark
   sections, bold CTA banner, dark footer.
   ========================================================================== */

:root {
    --ink: #0b0d12;
    --ink-soft: #12151c;
    --paper: #ffffff;
    --paper-soft: #f5f7fa;
    --border: #e5e8ee;
    --text-muted: #6b7280;
    --text-on-dark-muted: #9aa3af;

    --blue: #2563eb;
    --blue-dark: #1d4ed8;

    --accent-indigo: #4f46e5;
    --accent-blue: #2563eb;
    --accent-emerald: #059669;
    --accent-violet: #7c3aed;
    --accent-amber: #d97706;
    --accent-teal: #0d9488;
    --accent-rose: #e11d48;
    --accent-brown: #92400e;

    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);
    --container: 1180px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4 {
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin: 0 0 16px;
}

p { margin: 0 0 16px; color: var(--text-muted); }

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

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

/* ---------- Header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(11, 13, 18, .92);
    backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid rgba(255,255,255,.06);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.15rem;
    color: #fff;
}

.brand-mark {
    width: 32px;
    height: 32px;
    border-radius: 9px;
    background: linear-gradient(135deg, var(--blue), #7c3aed);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.main-nav > a {
    color: #cdd3dd;
    font-weight: 500;
    font-size: .95rem;
    transition: color .15s ease;
}

.main-nav > a:hover,
.main-nav > a.active {
    color: #fff;
}

.nav-dropdown { position: relative; }

.nav-dropdown-trigger {
    background: none;
    border: none;
    color: #cdd3dd;
    font: inherit;
    font-weight: 500;
    font-size: .95rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0;
}

.nav-dropdown-trigger .chev { font-size: .7rem; opacity: .7; }

.nav-dropdown-panel {
    position: absolute;
    top: calc(100% + 18px);
    left: 50%;
    transform: translateX(-50%);
    width: 340px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 20px 40px rgba(0,0,0,.18);
    padding: 10px;
    display: none;
    flex-direction: column;
}

.nav-dropdown:hover .nav-dropdown-panel,
.nav-dropdown:focus-within .nav-dropdown-panel {
    display: flex;
}

.nav-dropdown-panel a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--ink);
}

.nav-dropdown-panel a:hover { background: var(--paper-soft); }

.nav-dropdown-panel a strong {
    display: block;
    font-size: .9rem;
}

.nav-dropdown-panel a small {
    display: block;
    color: var(--text-muted);
    font-size: .78rem;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: .95rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .12s ease, box-shadow .12s ease, background .15s ease;
}

.btn-primary {
    background: var(--blue);
    color: #fff;
}

.btn-primary:hover { background: var(--blue-dark); }

.btn-dark {
    background: #fff;
    color: var(--ink);
}

.btn-outline {
    background: transparent;
    border-color: rgba(255,255,255,.25);
    color: #fff;
}

.btn-outline:hover { border-color: rgba(255,255,255,.55); }

.btn-sm { padding: 9px 18px; font-size: .875rem; }

/* ---------- Hero ---------- */

.hero {
    position: relative;
    background: var(--ink);
    color: #fff;
    overflow: hidden;
    padding: 96px 0 72px;
    min-height: 460px;
    display: flex;
    align-items: center;
}

/* Flowing aurora-style glow bands across the full hero, matching the
   reference template's dark hero treatment (used on Home, About, Solutions,
   and every product detail page for a consistent dark-hero look). */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(65% 55% at 8% 75%, rgba(37,99,235,.55), transparent 62%),
        radial-gradient(55% 50% at 48% 15%, rgba(59,130,246,.40), transparent 60%),
        radial-gradient(60% 55% at 92% 70%, rgba(124,58,237,.45), transparent 62%),
        radial-gradient(40% 40% at 70% 95%, rgba(37,99,235,.35), transparent 60%);
    filter: blur(50px);
    pointer-events: none;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11,13,18,0) 0%, rgba(11,13,18,.55) 85%, var(--ink) 100%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.eyebrow {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .78rem;
    font-weight: 700;
    color: var(--blue);
    margin-bottom: 14px;
}

.hero h1 {
    font-size: clamp(2.2rem, 4.5vw, 3.4rem);
    color: #fff;
    max-width: 780px;
}

.hero .lead {
    color: var(--text-on-dark-muted);
    font-size: 1.1rem;
    max-width: 620px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.breadcrumb {
    color: var(--text-on-dark-muted);
    font-size: .875rem;
    margin-bottom: 18px;
}

.breadcrumb a { color: var(--text-on-dark-muted); }
.breadcrumb a:hover { color: #fff; }

.hero-points {
    display: flex;
    gap: 24px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.hero-point {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #dfe3ea;
    font-size: .9rem;
    font-weight: 500;
}

.hero-point .check {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(37,99,235,.2);
    color: var(--blue);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .7rem;
}

/* ---------- Sections ---------- */

section { padding: 88px 0; }

.section-soft { background: var(--paper-soft); }
.section-dark { background: var(--ink); color: #fff; }
.section-dark p { color: var(--text-on-dark-muted); }
.section-dark h2, .section-dark h3 { color: #fff; }

.section-head {
    max-width: 640px;
    margin: 0 auto 56px;
    text-align: center;
}

.section-head.left { text-align: left; margin: 0 0 48px; }

.section-head h2 {
    font-size: clamp(1.7rem, 3vw, 2.3rem);
}

/* ---------- Cards / grids ---------- */

.grid {
    display: grid;
    gap: 24px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
}

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(37,99,235,.1);
    color: var(--blue);
    margin-bottom: 18px;
    font-weight: 700;
}

.card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.card p { margin-bottom: 0; font-size: .93rem; }

.product-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card .tagline {
    font-size: .85rem;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.product-card .learn-more {
    margin-top: auto;
    font-weight: 600;
    color: var(--blue);
    font-size: .9rem;
}

/* Accent-colored icon backgrounds, one per product */
.accent-indigo .card-icon  { background: rgba(79,70,229,.1); color: var(--accent-indigo); }
.accent-blue .card-icon    { background: rgba(37,99,235,.1); color: var(--accent-blue); }
.accent-emerald .card-icon { background: rgba(5,150,105,.1); color: var(--accent-emerald); }
.accent-violet .card-icon  { background: rgba(124,58,237,.1); color: var(--accent-violet); }
.accent-amber .card-icon   { background: rgba(217,119,6,.1); color: var(--accent-amber); }
.accent-teal .card-icon    { background: rgba(13,148,136,.1); color: var(--accent-teal); }
.accent-rose .card-icon    { background: rgba(225,29,72,.1); color: var(--accent-rose); }
.accent-brown .card-icon   { background: rgba(146,64,14,.1); color: var(--accent-brown); }

.accent-indigo.dot  { background: var(--accent-indigo); }
.accent-blue.dot    { background: var(--accent-blue); }
.accent-emerald.dot { background: var(--accent-emerald); }
.accent-violet.dot  { background: var(--accent-violet); }
.accent-amber.dot   { background: var(--accent-amber); }
.accent-teal.dot    { background: var(--accent-teal); }
.accent-rose.dot    { background: var(--accent-rose); }
.accent-brown.dot   { background: var(--accent-brown); }

/* ---------- Alternating feature rows ---------- */

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.feature-row.reverse .feature-media { order: 2; }
.feature-row.reverse .feature-copy { order: 1; }

@media (max-width: 860px) {
    .feature-row, .feature-row.reverse {
        grid-template-columns: 1fr;
    }
    .feature-row.reverse .feature-media,
    .feature-row.reverse .feature-copy {
        order: initial;
    }
}

.feature-row + .feature-row { margin-top: 96px; }

.feature-media {
    background: var(--paper-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-media .placeholder {
    text-align: center;
    color: var(--text-muted);
}

.feature-copy h3 { font-size: 1.6rem; }

.checklist { list-style: none; margin: 20px 0 0; padding: 0; }

.checklist li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    font-size: .95rem;
}

.checklist .check {
    flex: 0 0 auto;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(37,99,235,.12);
    color: var(--blue);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .72rem;
    margin-top: 2px;
}

/* ---------- Module list ---------- */

.module-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

@media (max-width: 700px) { .module-list { grid-template-columns: 1fr; } }

.module-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 20px;
}

.module-item h4 { margin: 0 0 6px; font-size: 1rem; }
.module-item p { margin: 0; font-size: .88rem; }

/* ---------- CTA banner ---------- */

.cta-banner {
    background: linear-gradient(135deg, var(--blue), #4338ca);
    background-image:
        linear-gradient(135deg, var(--blue), #4338ca),
        repeating-linear-gradient(0deg, rgba(255,255,255,.06) 0 1px, transparent 1px 64px),
        repeating-linear-gradient(90deg, rgba(255,255,255,.06) 0 1px, transparent 1px 64px);
    border-radius: 28px;
    padding: 72px 40px;
    text-align: center;
    color: #fff;
}

.cta-banner h2 { color: #fff; font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
.cta-banner p { color: rgba(255,255,255,.85); max-width: 520px; margin: 0 auto 28px; }

.cta-form {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-form input {
    padding: 13px 18px;
    border-radius: 999px;
    border: none;
    min-width: 280px;
    font: inherit;
}

/* ---------- Footer ---------- */

.site-footer {
    background: var(--ink);
    color: var(--text-on-dark-muted);
    padding: 72px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

@media (max-width: 800px) {
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

.footer-brand p { color: var(--text-on-dark-muted); font-size: .9rem; max-width: 300px; }

.footer-col h4 {
    color: #fff;
    font-size: .82rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    color: var(--text-on-dark-muted);
    font-size: .9rem;
    margin-bottom: 10px;
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    font-size: .82rem;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-links a { margin-left: 20px; color: var(--text-on-dark-muted); }
.footer-links a:hover { color: #fff; }

/* ---------- Utility ---------- */

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }