/* ============================================
   GYMFREAKS KRAFTSTATIONEN - Design System
   ============================================ */

/* ---------- CSS Variables / Tokens ---------- */
:root {
    /* Colors */
    --bg-dark: #0B0F14;
    --bg-surface: #111827;
    --bg-surface-alt: #0F172A;
    --border-color: #1F2937;
    --border-hover: #374151;

    --text-primary: #E5E7EB;
    --text-muted: #9CA3AF;
    --text-heading: #F9FAFB;

    --accent-primary: #39FF88;
    --accent-primary-dark: #2DD973;
    --accent-secondary: #60A5FA;

    /* Shadows & Glows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --glow-primary: 0 0 20px rgba(57, 255, 136, 0.3);
    --glow-primary-strong: 0 0 30px rgba(57, 255, 136, 0.5);

    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 72px;

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Sizing */
    --max-width: 1200px;
    --header-height: 72px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(ellipse at 50% 0%, rgba(57, 255, 136, 0.03) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    min-height: 100vh;
}

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

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul,
ol {
    list-style: none;
}

/* ---------- Utility Classes ---------- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-heading);
    text-align: center;
    margin-bottom: var(--space-xl);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 12px 24px;
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    min-height: 44px;
    white-space: nowrap;
}

.btn--primary {
    background: var(--accent-primary);
    color: var(--bg-dark);
    box-shadow: var(--shadow-md), var(--glow-primary);
}

.btn--primary:hover {
    background: var(--accent-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-primary-strong);
}

.btn--primary:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.btn--outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn--outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.btn--outline:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.btn--lg {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(11, 15, 20, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo__main {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--accent-primary);
    letter-spacing: -0.02em;
}

.logo__sub {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav {
    display: none;
}

.nav__list {
    display: flex;
    gap: var(--space-lg);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    padding: var(--space-xs) 0;
}

.nav__link:hover {
    color: var(--accent-primary);
}

.nav__link:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

.header__cta {
    display: none;
}

.burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
}

.burger__line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.burger[aria-expanded="true"] .burger__line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger[aria-expanded="true"] .burger__line:nth-child(2) {
    opacity: 0;
}

.burger[aria-expanded="true"] .burger__line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.nav.is-open {
    display: block;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-dark);
    padding: var(--space-lg);
    overflow-y: auto;
}

.nav.is-open .nav__list {
    flex-direction: column;
    gap: 0;
}

.nav.is-open .nav__link {
    display: block;
    padding: var(--space-sm) 0;
    font-size: var(--font-size-lg);
    border-bottom: 1px solid var(--border-color);
}

/* Desktop Header */
@media (min-width: 900px) {
    .nav {
        display: block;
    }

    .header__cta {
        display: inline-flex;
    }

    .burger {
        display: none;
    }
}

/* ============================================
   HERO
   ============================================ */
.hero {
    padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-2xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero__inner {
    display: grid;
    gap: var(--space-xl);
    align-items: center;
}

.hero__content {
    max-width: 600px;
}

.hero__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--text-heading);
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.hero__disclosure {
    display: block;
    font-size: var(--font-size-sm);
    margin-top: var(--space-sm);
    opacity: 0.8;
}

.hero__ctas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.hero__trust {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.hero__trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.hero__trust-item .icon {
    color: var(--accent-primary);
    width: 18px;
    height: 18px;
}

.hero__visual {
    position: relative;
    aspect-ratio: 1/1;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--bg-surface);
    min-height: 400px;
    width: 100%;
}

.hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    opacity: 1;
}

.hero__glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(57, 255, 136, 0.05) 0%, transparent 40%);
    pointer-events: none;
}

@media (min-width: 900px) {
    .hero__inner {
        grid-template-columns: 1fr 1fr;
    }

    .hero__title {
        font-size: var(--font-size-5xl);
    }
}

/* ============================================
   CATEGORIES
   ============================================ */
.categories {
    padding: var(--space-2xl) 0;
}

.categories__grid {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: 1fr;
}

.card--category {
    display: flex;
    flex-direction: column;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card--category:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: var(--glow-primary);
}

.card--category:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.card__image-wrapper {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--bg-surface-alt);
}

.card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card--category:hover .card__image {
    transform: scale(1.05);
}

.card__content {
    padding: var(--space-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--space-xs);
}

.card__text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    flex: 1;
    margin-bottom: var(--space-sm);
}

.card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--accent-primary);
    margin-top: auto;
}

.card__link .icon {
    transition: transform var(--transition-fast);
}

.card--category:hover .card__link .icon {
    transform: translateX(4px);
}

@media (min-width: 600px) {
    .categories__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .categories__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
   STEPS
   ============================================ */
.steps {
    padding: var(--space-2xl) 0;
    background: var(--bg-surface-alt);
}

.steps__grid {
    display: grid;
    gap: var(--space-lg);
}

.step {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    padding: var(--space-lg);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.step__number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--bg-dark);
    background: var(--accent-primary);
    border-radius: 50%;
}

.step__content {
    flex: 1;
}

.step__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--space-xs);
}

.step__text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

@media (min-width: 900px) {
    .steps__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   TOP PICKS
   ============================================ */
.picks {
    padding: var(--space-2xl) 0;
}

.picks__grid {
    display: grid;
    gap: var(--space-md);
}

.pick-card {
    position: relative;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.pick-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-secondary);
    box-shadow: 0 0 20px rgba(96, 165, 250, 0.2);
}

.pick-card__badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    padding: 6px 12px;
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--bg-dark);
    background: var(--accent-primary);
    border-radius: var(--radius-sm);
    z-index: 1;
}

.pick-card__image-wrapper {
    aspect-ratio: 16/9;
    background: var(--bg-surface-alt);
    overflow: hidden;
}

.pick-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
}

.pick-card__content {
    padding: var(--space-md);
}

.pick-card__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--space-sm);
}

.pick-card__pros {
    margin-bottom: var(--space-md);
}

.pick-card__pros li {
    position: relative;
    padding-left: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.pick-card__pros li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 700;
}

.picks__note {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--space-lg);
    font-style: italic;
}

@media (min-width: 600px) {
    .picks__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .picks__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   FAQ
   ============================================ */
.faq {
    padding: var(--space-2xl) 0;
    background: var(--bg-surface-alt);
}

.faq__list {
    max-width: 800px;
    margin: 0 auto;
}

.faq__item {
    border-bottom: 1px solid var(--border-color);
}

.faq__item:first-child {
    border-top: 1px solid var(--border-color);
}

.faq__question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    width: 100%;
    padding: var(--space-md) 0;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-heading);
    cursor: pointer;
    list-style: none;
}

.faq__question::-webkit-details-marker {
    display: none;
}

.faq__question:hover {
    color: var(--accent-primary);
}

.faq__question:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
}

.faq__icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    color: var(--text-muted);
    transition: transform var(--transition-base);
}

.faq__item[open] .faq__icon {
    transform: rotate(180deg);
}

.faq__answer {
    padding-bottom: var(--space-md);
}

.faq__answer p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--space-xl) 0;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
}

.footer__inner {
    display: grid;
    gap: var(--space-lg);
    text-align: center;
}

.footer__text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.footer__disclosure {
    display: block;
    margin-top: var(--space-xs);
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

.footer__nav {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

.footer__link {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--accent-primary);
}

.footer__link:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

.footer__social {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

.footer__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-muted);
    background: var(--bg-surface-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.footer__social-link:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.footer__social-link:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.footer__social-link svg {
    width: 20px;
    height: 20px;
}

.footer__copy {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    opacity: 0.6;
}

@media (min-width: 768px) {
    .footer__inner {
        grid-template-columns: 2fr 1fr 1fr;
        text-align: left;
        align-items: center;
    }

    .footer__text {
        margin: 0;
    }

    .footer__nav {
        justify-content: center;
    }

    .footer__social {
        justify-content: flex-end;
    }

    .footer__copy {
        grid-column: 1 / -1;
        text-align: center;
        margin-top: var(--space-md);
        padding-top: var(--space-md);
        border-top: 1px solid var(--border-color);
    }
}