/* ===========================================
   AI CLOUD LAB — Clean hosting template
   Light/Dark theme | Hetzner-inspired
   =========================================== */

/* ----- Fonts ----- */
@font-face {
    font-family: 'Inter';
    src: url('../fonts/inter-regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Inter';
    src: url('../fonts/inter-medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Inter';
    src: url('../fonts/inter-semibold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Inter';
    src: url('../fonts/inter-bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* ----- Light theme (default) ----- */
:root,
[data-theme="light"] {
    --bg-base: #ffffff;
    --bg-alt: #f6f7f9;
    --bg-card: #ffffff;
    --bg-elevated: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.92);
    --bg-header-scrolled: rgba(255, 255, 255, 0.98);

    --text-primary: #1a1b23;
    --text-secondary: #5a5e6b;
    --text-tertiary: #8b8f9b;
    --text-inverse: #ffffff;

    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-subtle: #eff6ff;
    --accent-light: #dbeafe;

    --border: #e2e4e9;
    --border-light: #eef0f3;
    --border-card: #eaecf0;
    --border-card-hover: #c8cad0;

    --success: #16a34a;
    --warning: #d97706;
    --error: #dc2626;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
}

/* ----- Dark theme ----- */
[data-theme="dark"] {
    --bg-base: #0b0c10;
    --bg-alt: #12131a;
    --bg-card: #16171f;
    --bg-elevated: #1a1b24;
    --bg-header: rgba(11, 12, 16, 0.88);
    --bg-header-scrolled: rgba(11, 12, 16, 0.97);

    --text-primary: #e8e9ed;
    --text-secondary: #9498a3;
    --text-tertiary: #636774;
    --text-inverse: #ffffff;

    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-subtle: rgba(59, 130, 246, 0.08);
    --accent-light: rgba(59, 130, 246, 0.12);

    --border: #262830;
    --border-light: #1e2027;
    --border-card: #262830;
    --border-card-hover: #3b3f4a;

    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
    --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
}

/* ----- Shared tokens ----- */
:root {
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-full: 9999px;

    --header-h: 64px;
    --max-width: 1200px;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 180ms;
    --duration-normal: 300ms;
}

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

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

body {
    font-family: 'Inter', -apple-system, 'Segoe UI', sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background var(--duration-normal) var(--ease-out),
                color var(--duration-normal) var(--ease-out);
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
a:hover { color: var(--accent-hover); }
ul, ol { list-style: none; }

/* ----- Scrollbar ----- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }
::selection { background: var(--accent-subtle); color: var(--accent); }

/* ----- Focus ----- */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ========================================
   HEADER
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-h);
    background: var(--bg-header);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    transition: background var(--duration-normal) var(--ease-out);
}

.header.scrolled {
    background: var(--bg-header-scrolled);
    box-shadow: var(--shadow-sm);
}

.header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    position: relative;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: opacity var(--duration-fast);
    flex-shrink: 0;
}
.logo:hover { opacity: 0.85; color: var(--text-primary); }

.logo__mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
}

.logo__text span { color: var(--accent); }

/* Header right area */
.header__right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Theme toggle */
.theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast) var(--ease-out);
}
.theme-toggle:hover {
    background: var(--accent-subtle);
    color: var(--accent);
    border-color: var(--accent);
}
.theme-toggle:active { transform: scale(0.92); }

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav__link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    transition: all var(--duration-fast) var(--ease-out);
}
.nav__link:hover { color: var(--text-primary); background: var(--accent-subtle); }
.nav__link--active {
    color: var(--accent);
    background: var(--accent-subtle);
    font-weight: 600;
}

/* Mobile toggle */
.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast);
}
.menu-toggle:hover { background: var(--accent-subtle); }

/* ========================================
   CONTAINER
   ======================================== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.92rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    text-decoration: none;
    line-height: 1.2;
}

.btn--primary {
    background: var(--accent);
    color: white;
    box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-card);
    color: white;
}
.btn--primary:active { transform: translateY(0); }

.btn--outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn--outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-subtle);
    transform: translateY(-1px);
}

.btn--sm { padding: 8px 16px; font-size: 0.85rem; }
.btn--lg { padding: 14px 30px; font-size: 1rem; }
.btn--block { width: 100%; }

/* ========================================
   HERO
   ======================================== */
.hero {
    position: relative;
    padding: 120px 0 80px;
    background: var(--bg-alt);
    overflow: hidden;
}

.hero__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

.hero__content { max-width: 560px; }

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: var(--accent-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}
.hero__badge i { font-size: 0.7rem; }

.hero__title {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.hero__title .accent { color: var(--accent); }

.hero__subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
    max-width: 480px;
}

.hero__actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Hero stats card */
.hero__visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__stats-card {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-card);
}

.hero__stats-card__title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin-bottom: 18px;
}

.hero__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.hero__stat-item {
    padding: 14px 10px;
    background: var(--bg-alt);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: background var(--duration-fast);
}
.hero__stat-item:hover { background: var(--accent-subtle); }

.hero__stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 2px;
}
.hero__stat-label {
    font-size: 0.78rem;
    color: var(--text-tertiary);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    padding: 80px 0;
    position: relative;
}
.section--alt { background: var(--bg-alt); }

.section__header {
    text-align: center;
    max-width: 650px;
    margin: 0 auto 48px;
}

.section__title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.section__desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* ========================================
   FEATURES GRID
   ======================================== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    transition: all var(--duration-fast) var(--ease-out);
}
.feature-card:hover {
    border-color: var(--border-card-hover);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
}

.feature-card__icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-bottom: 16px;
    background: var(--accent-subtle);
    color: var(--accent);
}

.feature-card__title {
    font-size: 1.02rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card__desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ========================================
   PRICING CARDS
   ======================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all var(--duration-fast) var(--ease-out);
    position: relative;
    display: flex;
    flex-direction: column;
}
.pricing-card:hover {
    border-color: var(--border-card-hover);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
}

.pricing-card--featured {
    border-color: var(--accent);
    background: var(--accent-subtle);
}
.pricing-card--featured:hover { border-color: var(--accent-hover); }

.pricing-card__badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 3px 12px;
    background: var(--accent);
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    color: white;
}

.pricing-card__name {
    font-size: 1.08rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.pricing-card__desc {
    font-size: 0.86rem;
    color: var(--text-tertiary);
    margin-bottom: 18px;
    line-height: 1.5;
}

.pricing-card__price {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}
.pricing-card__price-period {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-tertiary);
}

.pricing-card__specs {
    margin: 0 0 20px;
}

.pricing-card__spec {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 0.88rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}
.pricing-card__spec:last-child { border-bottom: none; }
.pricing-card__spec i { color: var(--success); width: 14px; text-align: center; font-size: 0.7rem; }

.pricing-card .btn { margin-top: auto; }

/* ========================================
   TESTIMONIALS
   ======================================== */
.testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.testimonial {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--duration-fast) var(--ease-out);
}
.testimonial:hover {
    border-color: var(--border-card-hover);
    transform: translateY(-2px);
}

.testimonial__stars {
    color: var(--warning);
    font-size: 0.82rem;
    margin-bottom: 12px;
}

.testimonial__text {
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.7;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.testimonial__author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.testimonial__avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.testimonial__name { font-size: 0.88rem; font-weight: 600; }
.testimonial__role { font-size: 0.78rem; color: var(--text-tertiary); }

/* ========================================
   TRUST BAR
   ======================================== */
.trust-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    justify-content: center;
    align-items: center;
    padding: 32px 0;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 0.88rem;
}
.trust-item i { color: var(--success); }

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
    padding: 80px 0;
    text-align: center;
    background: var(--bg-alt);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.cta-section__title {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-section__desc {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 480px;
    margin: 0 auto 28px;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--bg-alt);
    padding: 56px 0 28px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 36px;
}

.footer__brand { max-width: 280px; }
.footer__brand .logo { margin-bottom: 14px; font-size: 1.1rem; }

.footer__desc {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    line-height: 1.7;
}

.footer__heading {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.footer__links { display: flex; flex-direction: column; gap: 8px; }
.footer__link {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    transition: color var(--duration-fast);
}
.footer__link:hover { color: var(--accent); }

.footer__bottom {
    border-top: 1px solid var(--border-light);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
}

.footer__copy { font-size: 0.82rem; color: var(--text-tertiary); }

.footer__socials { display: flex; gap: 8px; }
.footer__social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    transition: all var(--duration-fast) var(--ease-out);
}
.footer__social-link:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    transform: translateY(-2px);
}

/* ========================================
   TOAST
   ======================================== */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 9999;
    transform: translateY(120%);
    opacity: 0;
    transition: all 0.35s var(--ease-out);
}
.toast--visible { transform: translateY(0); opacity: 1; }
.toast--success i { color: var(--success); }
.toast--error i { color: var(--error); }

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll { opacity: 0; }
.animate-in {
    animation: fadeInUp 0.5s var(--ease-out) forwards;
}

/* ========================================
   UTILITY
   ======================================== */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
    .hero__grid { grid-template-columns: 1fr; gap: 36px; }
    .hero__content { max-width: 100%; text-align: center; }
    .hero__subtitle { margin: 0 auto 28px; }
    .hero__actions { justify-content: center; }
    .hero__visual { order: -1; }
    .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root { --header-h: 60px; }

    .header__inner { padding: 0 16px; }
    .container { padding: 0 16px; }

    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        background: var(--bg-header-scrolled);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 8px;
        gap: 2px;
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.3s var(--ease-out);
        pointer-events: none;
    }
    .nav--open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .nav__link { width: 100%; padding: 10px 14px; }
    .menu-toggle { display: flex; }

    .hero { padding: 100px 0 60px; }
    .section { padding: 50px 0; }

    .pricing-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
    .features { grid-template-columns: 1fr; }
    .testimonials { grid-template-columns: 1fr; }

    .footer__grid { grid-template-columns: 1fr; gap: 24px; }
    .footer__bottom { flex-direction: column; text-align: center; }
    .trust-bar { gap: 14px; }
}

@media (max-width: 480px) {
    .hero__title { font-size: 1.8rem; }
    .hero__actions { flex-direction: column; align-items: center; }
    .hero__actions .btn { width: 100%; max-width: 280px; }
    .pricing-card { padding: 24px 18px; }
    .hero__stats-card { padding: 20px; }
}