:root {
    --bg: #050b12;
    --bg-alt: #0b1522;
    --card: #0f1c2a;
    --teal: #11b7c8;
    --teal-soft: #14c8da;
    --text: #f4f7fb;
    --muted: #9fb3c8;
    --danger: #ff6b6b;
    --radius-lg: 18px;
    --radius-sm: 8px;
    --shadow-soft: 0 18px 35px rgba(0, 0, 0, 0.35);
    --container-width: 1080px;
    --transition-fast: 0.2s ease-out;
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
    margin: 0;
    font-family: var(--font-main);
    background: radial-gradient(circle at top, #0b2430, var(--bg));
    color: var(--text);
    line-height: 1.6;
}

/* Layout helpers */

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 4rem 0;
}

.section-alt {
    padding: 4rem  0;
    background: radial-gradient(circle at top, #0c1c29, #050b12);
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.section-intro {
    max-width: 650px;
    color: var(--muted);
    margin-bottom: 2rem;
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(14px);
    background: linear-gradient(to bottom, rgba(5,11,18,0.95), rgba(5,11,18,0.7));
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-mark {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 0, var(--teal-soft), var(--teal));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--bg);
    box-shadow: 0 0 18px rgba(17,183,200,0.7);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-weight: 700;
    letter-spacing: 0.04em;
    font-size: 1.05rem;
}

.logo-sub {
    font-size: 0.75rem;
    color: var(--muted);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
}

.main-nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 0.35rem 0.6rem;
    border-radius: 999px;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.06);
}

.btn-nav {
    border: 1px solid rgba(255,255,255,0.1);
}

/* Hero */

.hero {
    padding: 4rem 0 3rem;
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.1fr);
    gap: 3rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 2.3rem;
    line-height: 1.15;
    margin-bottom: 1rem;
}

.hero-text p {
    color: var(--muted);
    max-width: 640px;
}

.hero-cta {
    margin: 1.75rem 0 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.hero-note {
    font-size: 0.85rem;
    color: var(--muted);
}

.hero-list {
    list-style: none;
    padding: 0;
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.hero-list li {
    margin-bottom: 0.35rem;
}

/* Hero panel */

.hero-panel {
    display: flex;
    justify-content: flex-end;
}

.hero-card {
    background: radial-gradient(circle at top left, #102c38, #050b12);
    border-radius: 24px;
    padding: 1.9rem 1.7rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255,255,255,0.06);
}

.hero-card h2 {
    font-size: 1.3rem;
    margin-top: 0;
}

.hero-card p {
    color: var(--muted);
    font-size: 0.95rem;
}

.hero-mini-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    font-size: 0.9rem;
}

.hero-mini-list li::before {
    content: "• ";
    color: var(--teal);
}

/* Buttons */

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.6rem;
    border-radius: 999px;
    border: none;
    background: linear-gradient(135deg, var(--teal), var(--teal-soft));
    color: var(--bg);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 12px 25px rgba(0,0,0,0.45);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.btn-primary:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
    box-shadow: 0 16px 30px rgba(0,0,0,0.55);
}

/* Cards / grids */

.cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card);
    border-radius: var(--radius-lg);
    padding: 1.6rem 1.5rem;
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 10px 22px rgba(0,0,0,0.3);
}

.card h3 {
    margin-top: 0;
}

.card p {
    color: var(--muted);
    font-size: 0.95rem;
}

.card ul {
    padding-left: 1.1rem;
    margin: 0.75rem 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
}

/* About list */

.about-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.about-list li {
    margin-bottom: 0.7rem;
    color: var(--muted);
}

/* FAQ */

.faq-list details {
    background: var(--card);
    margin-bottom: 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 0.8rem 1rem;
}

.faq-list summary {
    cursor: pointer;
    font-weight: 500;
}

.faq-list p {
    margin-top: 0.75rem;
    color: var(--muted);
    font-size: 0.9rem;
}

/* Contact */

.section-contact {
    background: radial-gradient(circle at top, #0d2835, #050b12);
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
    gap: 2.5rem;
}

.contact-note {
    color: var(--muted);
}

.contact-form {
    background: var(--card);
    border-radius: 20px;
    padding: 1.75rem 1.5rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255,255,255,0.08);
}

.field {
    margin-bottom: 1rem;
}

.field label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
}

.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 0.6rem 0.65rem;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(6, 13, 20, 0.9);
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: 1px solid var(--teal);
}

.field textarea {
    resize: vertical;
}

.hp {
    position: absolute;
    left: -9999px;
    visibility: hidden;
}

.form-footnote {
    margin-top: 0.7rem;
    font-size: 0.8rem;
    color: var(--muted);
}

/* Footer */

.site-footer {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 1.5rem 0 2rem;
    background: #050910;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.footer-tagline {
    color: var(--muted);
}

/* Responsive */

@media (max-width: 900px) {
    .hero-inner,
    .cards,
    .grid-2,
    .contact-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero-panel {
        justify-content: flex-start;
    }

    .cards {
        gap: 1rem;
    }
}

@media (max-width: 720px) {
    .main-nav {
        display: none; /* simple mobile: could add burger later */
    }

    .hero {
        padding-top: 3rem;
    }

    .hero-text h1 {
        font-size: 1.8rem;
    }

    .section {
        padding: 3rem 0;
    }
}