/* Typography and base */
:root {
    /* Color palette derived from design research: deep blues convey trust, orange for innovation */
    --color-dark: #0a192f;      /* main page background */
    --color-bg: #0b1e39;        /* secondary page background */
    --color-surface: #122a4a;   /* card backgrounds */
    --color-border: #1c3a60;    /* borders for cards and elements */
    --color-primary: #1e3a8a;   /* primary blue used for links and highlights */
    --color-secondary: #2563eb; /* secondary blue used subtly on hover */
    --color-accent: #f97316;    /* warm accent used sparingly for CTAs */
    --color-light: #f9fafb;     /* light text and backgrounds */
    --color-muted: #94a3b8;     /* muted text for descriptions */

    --font-base: 'Inter', system-ui, sans-serif;
    --radius-md: 12px;
    --radius-lg: 18px;
    --transition-fast: 0.15s ease;
    --container-width: 1120px;
}

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

body {
    margin: 0;
    font-family: var(--font-base);
    line-height: 1.6;
    font-size: 16px;
    color: var(--color-light);
    background: radial-gradient(circle at top left, var(--color-bg) 0%, var(--color-dark) 60%);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}
h1 { font-size: clamp(2.2rem, 5vw, 3rem); }
h2 { font-size: 2rem; margin-bottom: 0.5rem; }
h3 { font-size: 1.3rem; margin-bottom: 0.4rem; }

p {
    margin: 0 0 1.1rem;
}

a { color: var(--color-light); text-decoration: underline; transition: color var(--transition-fast); }
a:hover { color: var(--color-light); }
a.btn { text-decoration: none; }

/* Layout containers */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}
.section {
    padding: 4rem 0;
}
.section-alt {
    background: var(--color-bg);
    padding: 4rem 0;
}
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}
.section-header.align-left {
    text-align: left;
    margin-left: 0;
}
.section-header p {
    color: var(--color-muted);
}

/* Header and navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    background: rgba(10, 25, 47, 0.8);
    border-bottom: 1px solid rgba(28, 58, 96, 0.5);
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
}
.logo a {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-light);
}
.main-nav {
    position: relative;
}
.nav-list {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    list-style-type: none;
}
.nav-list a {
    font-size: 0.95rem;
    color: var(--color-muted);
    transition: color var(--transition-fast), transform var(--transition-fast);
    text-decoration: none;
}
.nav-list a:hover { color: var(--color-light); transform: translateY(-1px); }
.nav-list a.btn { color: var(--color-light); }
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}
.nav-toggle-bar {
    width: 22px;
    height: 2px;
    background: var(--color-light);
    border-radius: 2px;
}

/* Hero section */
.hero {
    position: relative;
    padding: 5rem 0 4rem;
    color: var(--color-light);
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: linear-gradient(to right, rgba(10,25,47,0.88), rgba(10,25,47,0.6)), url('assets/hero-bg.png');
    background-size: cover;
    background-position: center;
    z-index: -1;
}
.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.5fr);
    gap: 3rem;
    align-items: center;
}
.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.75rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
}
.hero-text {
    max-width: 40rem;
    color: var(--color-muted);
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
}
.hero-aside {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.2rem 1.4rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.35);
}
.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-muted);
    margin-bottom: 0.4rem;
}
.stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-light);
    margin: 0 0 0.35rem;
}
.stat-note {
    font-size: 0.85rem;
    color: var(--color-muted);
    margin-bottom: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.4rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}
.btn:focus { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-small {
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
}
/* Primary button uses accent color to draw attention */
.btn { background: var(--color-accent); color: var(--color-dark); box-shadow: 0 10px 20px rgba(249, 115, 22, 0.4); }
.btn:hover { background: #f58a33; }
.btn-ghost {
    background: transparent;
    color: var(--color-light);
    border: 1px solid var(--color-accent);
    box-shadow: none;
}
.btn-ghost:hover {
    background: rgba(249, 115, 22, 0.1);
}

/* Grids and cards */
.grid {
    display: grid;
    gap: 1.7rem;
}
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.4rem 1.6rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.25);
}

#contact .card:not(:first-child) {
    margin-top: 1.5rem;
}

.card h3 {
    margin-top: 0;
    color: var(--color-light);
    margin-bottom: 0.6rem;
    font-size: 1.2rem;
}
.card p {
    color: var(--color-muted);
}
.card-list {
    margin-top: 0.8rem;
    list-style: none;
    padding: 0;
    margin-left: 0;
}
.card-list li {
    position: relative;
    padding-left: 1.3rem;
    font-size: 0.95rem;
    color: var(--color-light);
    margin-bottom: 0.4rem;
}
.card-list li::before {
    content: '\2022';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-accent);
    font-weight: 700;
}
.card-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent);
    margin-bottom: 0.4rem;
}

/* Steps */
.step {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.4rem;
    position: relative;
    box-shadow: 0 8px 18px rgba(0,0,0,0.2);
}
.step-number {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: var(--color-dark);
    font-weight: 700;
    margin-bottom: 0.8rem;
}
.step h3 {
    margin-bottom: 0.4rem;
    color: var(--color-light);
}
.step p {
    color: var(--color-muted);
}

/* About layout */
.about-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 2rem;
}
.about-aside .card {
    position: sticky;
    top: 6rem;
}

/* Contact section */
.contact-layout {
    align-items: flex-start;
}

.form-row {
    margin-bottom: 1.1rem;
}
label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.35rem;
    color: var(--color-muted);
}
input, textarea {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-dark);
    color: var(--color-light);
    font-family: inherit;
    font-size: 1rem;
}
input:focus, textarea:focus {
    outline: 2px solid var(--color-secondary);
    border-color: var(--color-secondary);
}

/* Footer */
.site-footer {
    border-top: 1px solid rgba(28, 58, 96, 0.5);
    padding: 1.5rem 0 2rem;
    background: var(--color-dark);
}
.footer-inner {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-muted);
}
.footer-meta {
    margin-top: 0.3rem;
}

/* Responsive breakpoints */
@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
    }
    .hero-aside {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1rem;
        margin-top: 2rem;
    }
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-layout, .grid-2 {
        grid-template-columns: 1fr;
    }
    .about-aside .card { position: static; }
}
@media (max-width: 640px) {
    .header-inner { padding: 0.6rem; }

    /* Show mobile toggle */
    .nav-toggle { display: flex; }
    .nav-list {
        position: absolute;
        top: 110%;
        right: 0;
        background: rgba(10, 25, 47, 0.95);
        border: 1px solid rgba(28, 58, 96, 0.5);
        border-radius: var(--radius-md);
        padding: 0.8rem 1rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.7rem;
        min-width: 180px;
        display: none;
    }
    .nav-list.is-open { display: flex; }

    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
}

.contact-status {
    margin-top: 0.75rem;
font-size: 0.9rem;
}

.contact-form,
.contact-status {
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.contact-form {
    opacity: 1;
}

.contact-status {
    opacity: 0;
    transform: translateY(8px);
}

.contact-status.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.contact-form.is-fading-out {
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
}

.contact-status.is-pending {
    color: #e5e7eb;
    opacity: 0.8;
}

.contact-status.is-success {
    color: #4ade80;
    position: absolute;
    height: 100%;
    width: 100%;
    text-align: center;
    left: 0;
    top: 0;
    padding-top: 50%;
}

.contact-status.is-error {
    color: #f97373;
}