/* 
  Stylesheet (no JavaScript)
  - All colors and sizes are defined as CSS variables (var(--xxx))
  - Responsive layout with simple breakpoints
*/

/* ---------- CSS Variables ---------- */
:root {
    /* Colors */
    --color-bg: hsl(223, 39%, 10%);
    --color-bg-alt: hsl(224, 46%, 11%);
    --color-surface: hsl(224, 50%, 13%);
    --color-text: hsl(222, 77%, 95%);
    --color-muted: hsla(222, 77%, 95%, 0.72);
    --color-border: hsla(222, 77%, 95%, 0.14);

    --color-primary: hsl(227, 100%, 58%);
    --color-primary-contrast: hsl(0, 0%, 100%);

    --color-success: hsl(146, 67%, 37%);
    --color-success-bg: hsla(146, 67%, 37%, 0.16);

    --color-error: hsl(359, 100%, 65%);
    --color-error-bg: hsla(359, 100%, 65%, 0.2);

    /* Layout & sizing */
    --container-max: 1100px;
    --container-pad: 20px;

    --radius-sm: 10px;
    --radius-md: 16px;

    --shadow: 0 18px 50px hsla(0, 0%, 0%, 0.35);

    --fs-1: 42px;
    --fs-2: 28px;
    --fs-3: 18px;
    --fs-4: 16px;
    --fs-5: 14px;

    --lh-base: 1.6;

    --space-1: 6px;
    --space-2: 10px;
    --space-3: 14px;
    --space-4: 18px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 44px;
    --space-8: 64px;

    --header-h: 78px;

    /* Buttons */
    --btn-pad-y: 12px;
    --btn-pad-x: 16px;

    /* Form */
    --input-h: 44px;
    --input-pad: 12px;
    --focus-ring: 0 0 0 4px hsla(227, 100%, 58%, 0.25);
}

/* ---------- Base ---------- */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: radial-gradient(1200px 600px at 20% 0%, hsla(227, 100%, 58%, 0.25), transparent 60%),
        radial-gradient(900px 500px at 90% 20%, hsla(227, 100%, 58%, 0.15), transparent 65%),
        var(--color-bg);
    color: var(--color-text);
    line-height: var(--lh-base);
}

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

a:hover {
    text-decoration: underline;
}

#main {
    /* Viewport height minus header and footer */
    min-height: calc(100vh - 193.2px);
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

h1,
h2,
h3 {
    line-height: 1.15;
    margin: 0 0 var(--space-3);
}

h1 {
    font-size: var(--fs-1);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--fs-2);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--fs-3);
}

p {
    margin: 0 0 var(--space-4);
    font-size: var(--fs-4);
    color: var(--color-text);
}

.lead {
    font-size: 18px;
    color: var(--color-muted);
}

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

.skip-link {
    position: absolute;
    left: -9999px;
    top: var(--space-2);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
}

.skip-link:focus {
    left: var(--space-3);
    outline: none;
    box-shadow: var(--focus-ring);
}

/* ---------- Header / Nav ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    height: var(--header-h);
    display: flex;
    align-items: center;
    background: rgba(11, 15, 25, 0.72);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    width: 100%;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 130px;
}

.brand-logo {
    display: block;
    width: 120px;
    height: auto;
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand-name {
    font-weight: 700;
    letter-spacing: -0.01em;
}

.brand-tagline {
    font-size: var(--fs-5);
    color: var(--color-muted);
}

.nav {
    display: flex;
    align-items: center;
    /* gap: var(--space-3); */
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav a {
    padding: 10px 10px;
    border-radius: var(--radius-sm);
    color: var(--color-muted);
}

.nav a:hover {
    color: var(--color-text);
    text-decoration: none;
    background: rgba(232, 238, 252, 0.06);
}

.nav-cta {
    color: var(--color-primary-contrast) !important;
    background: var(--color-primary);
}

.nav-cta:hover {
    background: rgba(43, 89, 255, 0.85) !important;
}

/* ---------- Hamburger ---------- */
.nav-toggle {
    display: none;
}

.nav-toggle-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle-btn span {
    width: 26px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
}

/* ---------- Sections ---------- */
.section {
    padding: calc(var(--header-h)) 0 var(--space-8);
}

.section:nth-child(1) {
    padding-top: var(--space-4);
}

.section-alt {
    background: linear-gradient(180deg, transparent, rgba(15, 22, 41, 0.65));
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

/* .hero {
    padding-top: calc(var(--space-8) - 10px);
} */

.hero-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.95fr;
    gap: var(--space-7);
    align-items: start;
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin: var(--space-5) 0 var(--space-5);
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}

.trust-row {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.pill {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 7px 10px;
    font-size: var(--fs-5);
    color: var(--color-muted);
    background: rgba(17, 26, 51, 0.45);
}

.hero-card {
    background: rgba(17, 26, 51, 0.7);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    box-shadow: var(--shadow);
}

.checklist {
    margin: 0 0 var(--space-5);
    padding: 0 0 0 18px;
    color: var(--color-muted);
}

.checklist li {
    margin: 0 0 var(--space-2);
}

.stack {
    display: grid;
    gap: var(--space-3);
}

.stack-item {
    padding: var(--space-3);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: rgba(232, 238, 252, 0.03);
}

.stack-title {
    font-weight: 700;
    margin-bottom: 3px;
}

.stack-desc {
    font-size: var(--fs-5);
    color: var(--color-muted);
}

/* ---------- Cards / Grids ---------- */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
    margin-top: var(--space-5);
}

.card {
    padding: var(--space-5);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: rgba(17, 26, 51, 0.55);
}

.callout {
    margin-top: var(--space-7);
    padding: var(--space-6);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: rgba(43, 89, 255, 0.10);
}

/* ---------- Imprint ---------- */
.imprint {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
    margin-top: var(--space-5);
}

.imprint-block {
    padding: var(--space-5);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: rgba(17, 26, 51, 0.45);
}

/* ---------- Buttons ---------- */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--btn-pad-y) var(--btn-pad-x);
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    color: var(--color-primary-contrast);
    border: 1px solid rgba(0, 0, 0, 0);
    font-weight: 600;
    text-decoration: none;
}

.button:hover {
    text-decoration: none;
    background: rgba(43, 89, 255, 0.85);
}

.button-ghost {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.button-ghost:hover {
    background: rgba(232, 238, 252, 0.06);
}

/* ---------- Alerts ---------- */
.alert {
    border-radius: var(--radius-md);
    padding: var(--space-4);
    border: 1px solid var(--color-border);
    margin: var(--space-5) 0;
}

.alert-success {
    border-color: rgba(31, 157, 85, 0.35);
    background: var(--color-success-bg);
}

.alert-error {
    border-color: rgba(255, 77, 79, 0.35);
    background: var(--color-error-bg);
}

.alert ul {
    margin: var(--space-2) 0 0;
    padding-left: 18px;
}

/* ---------- Form ---------- */
.form {
    margin-top: var(--space-5);
    background: rgba(17, 26, 51, 0.45);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-6);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.field {
    display: grid;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

label {
    font-weight: 600;
    font-size: var(--fs-5);
    color: var(--color-text);
}

.req {
    color: var(--color-error);
}

input,
textarea {
    width: 100%;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: rgba(11, 15, 25, 0.55);
    color: var(--color-text);
    padding: var(--input-pad);
    font-size: var(--fs-4);
}

input {
    height: var(--input-h);
}

textarea {
    resize: vertical;
    min-height: 140px;
}

input:focus,
textarea:focus {
    outline: none;
    box-shadow: var(--focus-ring);
    border-color: rgba(43, 89, 255, 0.55);
}

.form-actions {
    display: grid;
    gap: var(--space-3);
    margin-top: var(--space-3);
}

.smallprint {
    margin-top: var(--space-5);
}

/* Honeypot field: hidden visually, but still present for bots */
.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-6) 0;
    background: rgba(11, 15, 25, 0.55);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
}

.footer-right {
    display: inline-flex;
    gap: var(--space-5);
}

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

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
    :root {
        --fs-1: 36px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .imprint {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .brand-text {
        display: none;
    }

    .nav-toggle-btn {
        display: flex;
    }

    .nav {
        position: absolute;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: rgba(11, 15, 25, 0.95);
        border-bottom: 1px solid var(--color-border);
        display: flex;
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-4);
        gap: var(--space-2);

        /* hidden by default */
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .nav a {
        padding: 12px;
        border-radius: var(--radius-sm);
    }

    /* Show menu when checked */
    .nav-toggle:checked~.nav {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
        text-align: end;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .form {
        padding: var(--space-5);
    }

    .footer-inner {
        flex-flow: column;
        zoom: 0.9;
    }
}