:root {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #121c33;
    --color-surface: rgba(15, 23, 42, 0.88);
    --color-surface-alt: rgba(23, 46, 77, 0.72);
    --color-border: rgba(148, 163, 184, 0.24);
    --color-text-primary: #f1f5f9;
    --color-text-secondary: rgba(226, 232, 240, 0.92);
    --color-accent: #38bdf8;
    --color-accent-alt: #6366f1;
    --color-accent-warm: #f97316;
    --color-success: #22c55e;
    --color-error: #ef4444;
    --color-neutral-900: #0f172a;
    --color-neutral-800: #1e293b;
    --color-neutral-700: #334155;
    --header-height: 96px;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-lg: 0 30px 80px rgba(8, 47, 73, 0.45);
    --shadow-md: 0 18px 40px rgba(8, 47, 73, 0.3);
    --shadow-soft: 0 12px 25px rgba(15, 23, 42, 0.2);
    --spacing-lg: clamp(32px, 6vw, 64px);
    --spacing-xl: clamp(48px, 8vw, 96px);
    --line-height-tight: 1.2;
    --line-height-relaxed: 1.7;
    --font-size-display: clamp(2.4rem, 4.5vw, 3.6rem);
    --font-size-h2: clamp(1.9rem, 3.5vw, 2.6rem);
    --font-size-h3: clamp(1.4rem, 2.5vw, 1.85rem);
    --transition-base: 0.25s ease;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

body {
    font-family: 'Poppins', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.95) 0%, rgba(10, 12, 20, 1) 55%, #020617 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

body.is-nav-open {
    overflow: hidden;
}

body.is-nav-open::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.65);
    backdrop-filter: blur(6px);
    z-index: 999;
}

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

a {
    color: inherit;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

:where(a,
    button,
    [role="button"],
    input,
    select,
    textarea,
    summary) {
    outline-color: var(--color-accent);
    outline-offset: 3px;
}

:where(a,
    button,
    [role="button"],
    input,
    select,
    textarea,
    summary):focus-visible {
    outline: 2px solid var(--color-accent);
}

.container {
    width: min(1200px, 92vw);
    margin: 0 auto;
}

section.content-section,
section.sobre,
section.register-section,
section.login-section,
section#contato,
section#services,
section#industrias,
section#recicladores {
    padding: clamp(64px, 12vw, 120px) 0;
}

.section-eyebrow,
.banner__eyebrow {
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
}

h1,
h2,
h3,
h4 {
    color: #f8fafc;
    margin-top: 0;
    margin-bottom: 18px;
    font-weight: 600;
}

h1 {
    font-size: var(--font-size-display);
    line-height: var(--line-height-tight);
}

h2 {
    font-size: var(--font-size-h2);
    line-height: var(--line-height-tight);
}

h3,
h4 {
    font-size: var(--font-size-h3);
    line-height: 1.35;
}

p {
    margin-top: 0;
    margin-bottom: 16px;
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.btn,
button,
input,
textarea {
    font-family: inherit;
}

main {
    display: block;
    padding-top: var(--header-height);
}

main:focus {
    outline: none;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: clamp(18px, 4vw, 32px);
}

.surface {
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.8), rgba(30, 64, 175, 0.42));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow-soft);
    padding: clamp(24px, 6vw, 36px);
}

.surface--light {
    background: rgba(248, 250, 252, 0.06);
    border: 1px solid rgba(241, 245, 249, 0.12);
    color: var(--color-text-primary);
}

.surface--light p {
    color: var(--color-text-secondary);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.14);
    color: var(--color-accent);
    font-weight: 500;
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .container {
        width: min(100%, 92vw);
    }
}

@media (max-width: 1100px) {
    :root {
        --header-height: 88px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 76px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}