/* =========================
   1. DESIGN TOKENS
========================= */
:root {
    --color-bg: #101815;
    --color-surface: #1f3b32;
    --color-surface-soft: rgba(39, 75, 62, 0.72);
    --color-text: #f7f3e8;
    --color-muted: rgba(247, 243, 232, 0.72);
    --color-accent: #58f0cf;
    --color-border: rgba(247, 243, 232, 0.12);
    --font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --section-padding: clamp(72px, 10vw, 140px);
    --section-padding-sm: clamp(48px, 7vw, 96px);
    --radius-sm: 8px;
    --radius-md: 16px;
}

/* =========================
   2. BASE
========================= */
body {
    font-family: var(--font-base);
    background: var(--color-bg);
    color: var(--color-text);
}

img,

video {
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
}

/* =========================
   3. UTILITIES
========================= */
.section-padding {
    padding-block: var(--section-padding);
}

.section-padding-sm {
    padding-block: var(--section-padding-sm);
}

.section-dark {
    background: var(--color-bg);
    color: var(--color-text);
}

.section-surface {
    background: var(--color-surface);
    color: var(--color-text);
}

.text-muted-custom {
    color: var(--color-muted);
}

.max-width-md {
    max-width: 760px;
}

.max-width-lg {
    max-width: 960px;
}

/* =========================
   4. COMPONENTS
========================= */
.btn-brand {
    background: var(--color-accent);
    color: var(--color-bg);
    border: 0;
    font-weight: 700;
}

.btn-brand:hover {
    background: #78f7dc;
    color: var(--color-bg);
}

.btn-outline-brand {
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    font-weight: 700;
}

.btn-outline-brand:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}

.brand-card {
    padding: clamp(24px, 3vw, 40px);
    background: var(--color-surface-soft);
    border: 1px solid var(--color-border);
}

.section-label {
    margin-bottom: 1rem;
    color: var(--color-accent);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.section-title {
    margin: 0;
    font-size: clamp(2.25rem, 5vw, 4.8rem);
    line-height: 0.98;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.section-intro {
    margin-top: 1.5rem;
    color: var(--color-muted);
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    line-height: 1.55;
}

/* =========================
   5. HEADER
========================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(16, 24, 21, 0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
}

.site-navbar {
    padding-block: 1rem;
}

.site-navbar__brand {
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text);
}

.site-navbar__link {
    color: var(--color-muted);
    font-weight: 600;
}

.site-navbar__link:hover {
    color: var(--color-accent);
}

/* =========================
   6. HERO
========================= */
.hero-section {
    padding-block: clamp(96px, 14vw, 180px);
}

.hero-section__title {
    margin: 0;
    font-size: clamp(3rem, 8vw, 7rem);
    line-height: 0.9;
    font-weight: 850;
    letter-spacing: -0.06em;
}

.hero-section__text {
    margin-top: 1.5rem;
    color: var(--color-muted);
    font-size: clamp(1.1rem, 1.8vw, 1.35rem);
    line-height: 1.55;
}

.hero-section__actions {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* =========================
   7. PROBLEM SECTION
========================= */
.problem-section__header {
    max-width: 860px;
    margin-bottom: clamp(40px, 6vw, 88px);
}

.problem-section__title {
    margin: 0;
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    line-height: 0.95;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.problem-section__kicker {
    margin: clamp(16px, 2vw, 24px) 0 0;
    font-size: clamp(1.25rem, 2.4vw, 2rem);
    line-height: 1.2;
    font-weight: 700;
}

.problem-section__icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    background: rgba(88, 240, 207, 0.18);
    color: var(--color-accent);
    font-weight: 800;
}

.problem-section__card-title {
    margin: 24px 0 16px;
    font-size: clamp(1.25rem, 2vw, 1.7rem);
    line-height: 1.1;
    font-weight: 800;
}

.problem-section__card-text {
    margin: 0;
    color: var(--color-muted);
    line-height: 1.5;
}

/* =========================
   8. FOOTER
========================= */
.site-footer {
    padding-block: 40px;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
}