/* ========================================
   Coldstorm.org — Professional Consulting
   ======================================== */

:root {
    --bg: #ffffff;
    --bg-alt: #f8f9fb;
    --bg-card: #ffffff;
    --border: #e2e5ea;
    --border-light: #eef0f3;
    --text: #2d3748;
    --text-dim: #64748b;
    --text-heading: #0f172a;
    --accent: #1a56db;
    --accent-light: #e8effc;
    --accent-dark: #143ba0;
    --navy: #0f172a;
    --navy-light: #1e293b;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Nav ── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.nav.scrolled {
    border-bottom-color: var(--border-light);
    box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}

.nav-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.logo-cold { color: var(--navy); }
.logo-storm { color: var(--accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--text-heading); }

.nav-cta {
    background: var(--accent) !important;
    color: #fff !important;
    padding: 9px 22px !important;
    border-radius: 6px !important;
    transition: background 0.2s !important;
}

.nav-cta:hover {
    background: var(--accent-dark) !important;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--navy);
    transition: 0.3s;
}

/* ── Hero ── */
.hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 24px 80px;
    background: linear-gradient(170deg, #f0f4ff 0%, #ffffff 40%, #ffffff 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 720px;
}

.hero-badge {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-light);
    padding: 7px 18px;
    border-radius: 100px;
    margin-bottom: 28px;
    letter-spacing: 0.01em;
}

.hero h1 {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--text-heading);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-line { display: block; }

.hero-amp {
    display: inline;
    color: var(--accent);
}

.hero-sub {
    font-size: 1.125rem;
    color: var(--text-dim);
    max-width: 560px;
    margin: 0 auto 36px;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 13px 28px;
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--text-dim);
    background: var(--bg-alt);
}

.btn-large {
    padding: 15px 36px;
    font-size: 1rem;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.stat { text-align: center; }

.stat-num {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-heading);
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 2px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
}

/* ── Sections ── */
section { padding: 100px 0; }

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.25;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.0625rem;
    color: var(--text-dim);
    max-width: 540px;
    margin: 0 auto;
    line-height: 1.75;
}

/* ── Services ── */
.services { background: var(--bg-alt); }

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 36px 32px;
    transition: all 0.3s;
}

.service-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border);
    transform: translateY(-2px);
}

.service-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-light);
    border-radius: var(--radius);
    margin-bottom: 20px;
}

.service-icon svg {
    width: 22px;
    height: 22px;
    color: var(--accent);
}

.service-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.service-card ul {
    list-style: none;
    margin-bottom: 24px;
}

.service-card li {
    padding: 5px 0;
    padding-left: 18px;
    position: relative;
    font-size: 0.9375rem;
    color: var(--text);
}

.service-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 13px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
}

.service-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.service-tools span {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-light);
    padding: 4px 10px;
    border-radius: 4px;
}

/* ── About ── */
.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.credential-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 28px;
    transition: all 0.3s;
}

.credential-card:hover {
    box-shadow: var(--shadow-sm);
}

.credential-card.highlight {
    background: var(--accent-light);
    border-color: transparent;
}

.credential-company {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 4px;
}

.credential-role {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.credential-card p {
    font-size: 0.875rem;
    color: var(--text-dim);
    line-height: 1.7;
}

/* ── Process ── */
.process { background: var(--bg-alt); }

.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    margin-bottom: 72px;
}

.step {
    text-align: center;
    flex: 1;
    max-width: 280px;
    padding: 0 24px;
}

.step-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-light);
    margin-bottom: 12px;
    line-height: 1;
}

.step h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
}

.step p {
    font-size: 0.875rem;
    color: var(--text-dim);
    line-height: 1.65;
}

.step-connector {
    width: 48px;
    height: 1px;
    background: var(--border);
    margin-top: 20px;
    flex-shrink: 0;
}

.engagement-models {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 44px;
}

.engagement-models > h3 {
    text-align: center;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 28px;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.model {
    text-align: center;
    padding: 20px;
}

.model-name {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.model p {
    font-size: 0.875rem;
    color: var(--text-dim);
    line-height: 1.65;
}

/* ── Contact ── */
.contact { padding-bottom: 80px; }

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: var(--bg-alt);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-decoration: none;
    transition: all 0.3s;
}

.contact-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.contact-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-light);
    border-radius: var(--radius);
    margin-bottom: 14px;
}

.contact-icon svg {
    width: 20px;
    height: 20px;
    color: var(--accent);
}

.contact-label {
    display: block;
    font-size: 0.6875rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    margin-bottom: 2px;
}

.contact-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-heading);
}

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

/* ── Footer ── */
.footer {
    border-top: 1px solid var(--border-light);
    padding: 28px 0;
    background: var(--bg-alt);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-size: 1rem;
    font-weight: 700;
}

.footer-copy {
    font-size: 0.8125rem;
    color: var(--text-dim);
}

/* ── Animations ── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-content > * {
    animation: fadeUp 0.5s ease-out both;
}

.hero-badge { animation-delay: 0.05s; }
.hero h1 { animation-delay: 0.1s; }
.hero-sub { animation-delay: 0.2s; }
.hero-actions { animation-delay: 0.25s; }
.hero-stats { animation-delay: 0.35s; }

/* ── Responsive ── */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(12px);
        padding: 20px 24px;
        gap: 18px;
        border-bottom: 1px solid var(--border-light);
    }
    .nav-toggle { display: flex; }
    section { padding: 72px 0; }
    .services-grid, .about-grid { grid-template-columns: 1fr; }
    .models-grid, .contact-grid { grid-template-columns: 1fr; }
    .process-steps { flex-direction: column; align-items: center; }
    .step-connector { width: 1px; height: 32px; margin: 12px 0; }
    .hero-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .stat-divider { display: none; }
    .engagement-models { padding: 28px 20px; }
    .footer-inner { flex-direction: column; gap: 10px; text-align: center; }
}

@media (max-width: 480px) {
    .hero { padding: 100px 16px 60px; }
    .container { padding: 0 16px; }
    .service-card { padding: 24px 20px; }
}