:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #818cf8;
    --accent: #06b6d4;
    --text: #0f172a;
    --text-muted: #64748b;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --border: #e2e8f0;
    --shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.15);
    --radius: 14px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body.openits-public {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, sans-serif;
    color: var(--text);
    background: var(--surface-muted);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: var(--primary-dark);
}

/* ── Navbar ── */
.openits-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 0;
    transition: background 0.3s, box-shadow 0.3s;
}

.openits-nav.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.openits-nav .container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.openits-nav .brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.openits-nav .brand img {
    height: 64px;
    width: auto;
}

.openits-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.openits-nav .nav-links a {
    color: var(--text-muted);
    font-size: 0.925rem;
    font-weight: 500;
    transition: color 0.2s;
}

.openits-nav .nav-links a:hover {
    color: var(--primary);
}

.openits-nav .nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.openits-nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text);
}

/* ── Buttons ── */
.btn-openits {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.35rem;
    border-radius: 10px;
    font-size: 0.925rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    text-decoration: none;
}

.btn-openits:hover {
    transform: translateY(-1px);
}

.btn-openits-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.btn-openits-primary:hover {
    color: #fff;
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.btn-openits-outline {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--border);
}

.btn-openits-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-openits-ghost {
    background: transparent;
    color: var(--text-muted);
    padding: 0.65rem 1rem;
}

.btn-openits-ghost:hover {
    color: var(--primary);
}

.btn-openits-lg {
    padding: 0.85rem 1.75rem;
    font-size: 1rem;
}

.btn-openits-block {
    width: 100%;
}

/* ── Hero ── */
.hero {
    position: relative;
    padding: 8rem 1.5rem 5rem;
    overflow: hidden;
    background: linear-gradient(160deg, #eef2ff 0%, #f8fafc 45%, #ecfeff 100%);
}

.hero::before {
    content: "";
    position: absolute;
    top: -30%;
    right: -15%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero .container {
    max-width: 1140px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.hero h1 {
    font-size: clamp(2.25rem, 4vw, 3.25rem);
    font-weight: 800;
    line-height: 1.15;
    margin: 0 0 1.25rem;
    letter-spacing: -0.02em;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-lead {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin: 0 0 2rem;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.hero-protocols {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hero-protocol {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(79, 70, 229, 0.08);
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
}

.hero-stat strong {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.hero-stat span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-visual {
    position: relative;
}

.hero-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
}

.hero-card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1rem;
    background: #1e293b;
    color: #94a3b8;
    font-size: 0.75rem;
    font-family: "JetBrains Mono", monospace;
}

.hero-card-header .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.hero-card-header .dot.red { background: #ef4444; }
.hero-card-header .dot.yellow { background: #eab308; }
.hero-card-header .dot.green { background: #22c55e; }

.hero-card-body {
    padding: 1.25rem;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.8rem;
    line-height: 1.7;
    background: #0f172a;
    color: #e2e8f0;
}

.hero-card-body .method {
    color: #34d399;
    font-weight: 600;
}

.hero-card-body .path {
    color: #93c5fd;
}

.hero-card-body .comment {
    color: #64748b;
}

/* ── Sections ── */
.section {
    padding: 5rem 1.5rem;
}

.section .container {
    max-width: 1140px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 3.5rem;
}

.section-header h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    margin: 0 0 1rem;
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1.05rem;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.12), rgba(6, 182, 212, 0.12));
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 0.65rem;
}

.feature-card p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.925rem;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    counter-reset: step;
}

.step-card {
    text-align: center;
    padding: 2rem 1.5rem;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-weight: 700;
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.step-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0 0 0.5rem;
}

.step-card p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.9rem;
}

/* ── CTA ── */
.cta-section {
    padding: 5rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    text-align: center;
}

.cta-section h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    margin: 0 0 1rem;
}

.cta-section p {
    opacity: 0.9;
    max-width: 520px;
    margin: 0 auto 2rem;
    font-size: 1.05rem;
}

.cta-section .btn-openits-outline {
    border-color: rgba(255, 255, 255, 0.4);
    color: #fff;
}

.cta-section .btn-openits-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    color: #fff;
}

/* ── Footer ── */
.openits-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 3rem 1.5rem 1.5rem;
}

.openits-footer .container {
    max-width: 1140px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    color: #fff;
    font-weight: 700;
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
}

.openits-footer p {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.7;
}

.openits-footer h6 {
    color: #fff;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 1rem;
}

.openits-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.openits-footer ul li {
    margin-bottom: 0.5rem;
}

.openits-footer ul a {
    color: #94a3b8;
    font-size: 0.9rem;
}

.openits-footer ul a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
}

/* ── Auth pages ── */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    background: linear-gradient(160deg, #eef2ff 0%, #f8fafc 50%, #ecfeff 100%);
    position: relative;
}

.auth-page::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url("/images/bg.svg") center / cover no-repeat;
    opacity: 0.04;
    pointer-events: none;
}

.auth-wrapper {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
}

.auth-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    padding: 2.5rem;
}

.auth-logo {
    text-align: center;
    margin-bottom: 1.75rem;
}

.auth-logo a {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--text);
    font-weight: 700;
    font-size: 1.25rem;
}

.auth-logo img {
    height: 70px;
    width: auto;
}

.auth-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin: 0 0 0.35rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.925rem;
    margin: 0 0 1.75rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--text);
}

.form-control-openits {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.925rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--surface);
}

.form-control-openits:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.form-control-openits.is-invalid {
    border-color: #ef4444;
}

.invalid-feedback {
    display: block;
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 0.35rem;
}

.form-row-auth {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.form-check-auth {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-check-auth input {
    accent-color: var(--primary);
}

.auth-footer-text {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.925rem;
    color: var(--text-muted);
}

.auth-footer-text a {
    font-weight: 600;
}

.password-toggle {
    position: relative;
}

.password-toggle .toggle-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    font-size: 0.85rem;
}

.password-toggle .form-control-openits {
    padding-right: 2.75rem;
}

/* ── Responsive ── */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-lead,
    .hero-actions,
    .hero-stats {
        justify-content: center;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        max-width: 480px;
        margin: 0 auto;
    }

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

@media (max-width: 768px) {
    .openits-nav-toggle {
        display: block;
    }

    .openits-nav .nav-links,
    .openits-nav .nav-actions {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: 1rem 1.5rem;
        box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
        gap: 0.75rem;
    }

    .openits-nav .nav-links.open,
    .openits-nav .nav-actions.open {
        display: flex;
    }

    .openits-nav .nav-links {
        align-items: flex-start;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}