/* ====== CSS Variables ====== */
:root {
    --color-bg: #fafafa;
    --color-bg-alt: #ffffff;
    --color-text: #1a1a2e;
    --color-text-muted: #64648c;
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #eef2ff;
    --color-accent: #10b981;
    --color-accent-light: #d1fae5;
    --color-border: #e5e5e5;
    --color-code-bg: #1e1e2e;
    --color-code-text: #cdd6f4;
    --color-info-bg: #fef3c7;
    --color-info-border: #f59e0b;
    --color-warning-bg: #fee2e2;
    --color-warning-border: #ef4444;
    
    --font-sans: 'Plus Jakarta Sans', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --sidebar-width: 280px;
    --content-max-width: 800px;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.75em;
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; letter-spacing: -0.01em; margin-top: 2.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
    margin-bottom: 1rem;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

/* ====== Layout ====== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-bg-alt);
    border-right: 1px solid var(--color-border);
    padding: 24px;
    overflow-y: auto;
    z-index: 100;
}

.content {
    margin-left: var(--sidebar-width);
    padding: 48px;
    max-width: calc(var(--content-max-width) + var(--sidebar-width) + 96px);
}

/* ====== Sidebar ====== */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
}

.logo:hover {
    text-decoration: none;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.version {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-primary-light);
    padding: 2px 8px;
    border-radius: 20px;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-header {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.nav-link {
    display: block;
    padding: 8px 12px;
    margin: 2px 0;
    font-size: 0.95rem;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.nav-link.active {
    background: var(--color-primary);
    color: white;
}

/* ====== Hero Section ====== */
.hero {
    margin-bottom: 64px;
}

.badge {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent);
    background: var(--color-accent-light);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: 3rem;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

/* ====== Buttons ====== */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-bg-alt);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

/* ====== Sections ====== */
.section {
    margin-bottom: 64px;
}

.section > p {
    color: var(--color-text-muted);
    max-width: 650px;
}

/* ====== Feature Grid ====== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.feature-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.2s;
}

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ====== Code Blocks ====== */
.code-block {
    background: var(--color-code-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: 24px 0;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-code-text);
}

.copy-btn {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: rgba(255,255,255,0.1);
    border: none;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn:hover {
    background: rgba(255,255,255,0.2);
    color: white;
}

.code-block pre {
    padding: 20px;
    margin: 0;
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-code-text);
    background: transparent;
    padding: 0;
}

/* ====== Info Box ====== */
.info-box {
    display: flex;
    gap: 16px;
    background: var(--color-info-bg);
    border-left: 4px solid var(--color-info-border);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin: 24px 0;
}

.info-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.info-content {
    font-size: 0.95rem;
}

.info-content strong {
    color: var(--color-text);
}

.info-content p {
    margin: 0;
}

.warning-box {
    background: var(--color-warning-bg);
    border-left-color: var(--color-warning-border);
}

/* ====== Concept List ====== */
.concept-list {
    margin-top: 24px;
}

.concept-item {
    padding: 24px 0;
    border-bottom: 1px solid var(--color-border);
}

.concept-item:last-child {
    border-bottom: none;
}

.concept-item h3 {
    color: var(--color-text);
    margin-bottom: 8px;
}

.concept-item p {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* ====== Changelog ====== */
.changelog-preview {
    margin-top: 24px;
}

.changelog-item {
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
}

.changelog-item:last-child {
    border-bottom: none;
}

.changelog-version {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 2px 10px;
    border-radius: 4px;
    margin-right: 12px;
}

.changelog-date {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.changelog-item p {
    margin-top: 8px;
    margin-bottom: 0;
    color: var(--color-text-muted);
}

.link-more {
    display: inline-block;
    margin-top: 16px;
    font-weight: 500;
}

/* ====== CTA Section ====== */
.cta-section {
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, #f0fdf4 100%);
    padding: 48px;
    border-radius: var(--radius-lg);
}

.cta-section h2 {
    margin-top: 0;
}

.cta-section p {
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

/* ====== Footer ====== */
.footer {
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-disclaimer {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* ====== Tables ====== */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.95rem;
}

th, td {
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
}

th {
    font-weight: 600;
    background: var(--color-bg);
}

tr:hover {
    background: var(--color-bg);
}

/* ====== Endpoint Blocks ====== */
.endpoint {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin: 32px 0;
    overflow: hidden;
}

.endpoint-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.method {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
}

.method-get { background: #d1fae5; color: #047857; }
.method-post { background: #dbeafe; color: #1d4ed8; }
.method-put { background: #fef3c7; color: #b45309; }
.method-delete { background: #fee2e2; color: #b91c1c; }
.method-ws { background: #e9d5ff; color: #7c3aed; }

.endpoint-path {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--color-text);
}

.endpoint-body {
    padding: 24px;
}

.endpoint-body h4 {
    margin-top: 24px;
    margin-bottom: 12px;
}

.endpoint-body h4:first-child {
    margin-top: 0;
}

/* ====== Parameter Tables ====== */
.param-table {
    font-size: 0.9rem;
}

.param-table code {
    font-size: 0.85rem;
}

.param-name {
    font-family: var(--font-mono);
    font-weight: 500;
}

.param-type {
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.param-required {
    color: var(--color-warning-border);
    font-size: 0.75rem;
    font-weight: 600;
}

/* ====== Error Codes ====== */
.error-code {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--color-primary);
}

/* ====== Notes ====== */
.note {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: 8px;
}

/* ====== Mobile Nav Toggle ====== */
.mobile-nav-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 200;
    width: 44px;
    height: 44px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.mobile-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    margin: 4px auto;
    transition: all 0.3s;
}

.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
}

/* ====== Responsive ====== */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

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

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: none;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    .mobile-nav-overlay.open {
        display: block;
    }

    .content {
        margin-left: 0;
        padding: 24px;
        padding-top: 72px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
    }
}

/* ============================================================
   Landing Page (Waitlist)
   ============================================================ */

.landing-body {
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* ---- Header ---- */
.landing-header {
    padding: 20px 40px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-alt);
}

.landing-header-inner {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.landing-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.landing-logo-icon {
    font-size: 1.5rem;
}

.landing-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

/* ---- Main ---- */
.landing-main {
    flex: 1;
    width: 100%;
    min-width: 0;
    max-width: 680px;
    margin: 0 auto;
    padding: 64px 24px 48px;
    text-align: center;
    overflow: hidden;
}

/* ---- Hero ---- */
.landing-badge {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    background: var(--color-accent-light);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.landing-title {
    font-size: 3.25rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.landing-subtitle {
    font-size: 1.4rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.landing-description {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    max-width: min(540px, 100%);
    margin: 0 auto 40px;
}

/* ---- Code Preview ---- */
.landing-code-preview {
    max-width: min(520px, 100%);
    width: 100%;
    margin: 0 auto 48px;
    text-align: left;
    overflow: hidden;
}

.landing-code-preview .code-block {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

/* ---- Features Strip ---- */
.landing-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 56px;
}

.landing-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 8px;
    border-radius: var(--radius-md);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    transition: border-color 0.2s;
}

.landing-feature:hover {
    border-color: var(--color-primary);
}

.landing-feature-icon {
    font-size: 1.5rem;
}

.landing-feature div {
    text-align: center;
}

.landing-feature strong {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 2px;
}

.landing-feature span {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

/* ---- Waitlist ---- */
.landing-waitlist {
    background: linear-gradient(135deg, #f5f7ff 0%, var(--color-bg-alt) 50%, #f2fdf8 100%);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    margin-bottom: 32px;
}

.landing-waitlist-title {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 6px;
    color: var(--color-primary);
}

.landing-waitlist-text {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    margin-bottom: 32px;
}

.waitlist-form {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    max-width: 360px;
    margin: 0 auto;
}

.waitlist-input-group {
    width: 100%;
    text-align: left;
}

.waitlist-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.waitlist-input {
    width: 100%;
    padding: 14px 18px;
    font-family: var(--font-mono);
    font-size: 16px; /* >=16px prevents iOS auto-zoom on focus */
    color: #ffffff;
    background: var(--color-code-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

.waitlist-input::placeholder {
    color: #64648c;
}

.waitlist-input:focus {
    border-color: var(--color-primary);
}

.waitlist-form .cf-turnstile {
    align-self: center;
}

.waitlist-btn {
    width: 100%;
    padding: 16px 24px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #ffffff;
    background: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    box-sizing: border-box;
}

.waitlist-btn:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.waitlist-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.waitlist-error {
    font-size: 0.9rem;
    color: #e74c3c;
    font-weight: 500;
    min-height: 1.2em;
    text-align: center;
}

.waitlist-success {
    display: none;
    font-size: 1.1rem;
    color: var(--color-accent);
    font-weight: 600;
    padding: 14px 0;
}

/* ---- Docs Link ---- */
.landing-docs-link {
    display: inline-block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 48px;
}

.landing-docs-link:hover {
    color: var(--color-primary-hover);
}

/* ---- Humans Illustration Strip ---- */
.landing-humans {
    background:
        linear-gradient(rgba(255,255,255,0) 0%, var(--color-bg) 100%),
        repeating-linear-gradient(0deg, transparent, transparent 19px, var(--color-border) 19px, var(--color-border) 20px),
        repeating-linear-gradient(90deg, transparent, transparent 19px, var(--color-border) 19px, var(--color-border) 20px);
    background-size: 100% 100%, 20px 20px, 20px 20px;
    padding: 24px 0 0;
    overflow: hidden;
}

.landing-humans-inner {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.human-fig {
    width: 55px;
    height: 110px;
    flex-shrink: 1;
    min-width: 32px;
    opacity: 0.85;
}

.human-fig.fig-wide {
    width: 80px;
    min-width: 48px;
}

/* ---- Footer ---- */
.landing-footer {
    text-align: center;
    padding: 24px;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-alt);
}

.landing-footer p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.landing-footer-disclaimer {
    font-size: 0.8rem !important;
    opacity: 0.7;
}

/* ---- Landing Responsive ---- */

/* Tablet / small laptop */
@media (max-width: 768px) {
    .landing-header {
        padding: 16px 20px;
    }

    .landing-main {
        padding: 48px 20px 40px;
    }

    .landing-title {
        font-size: 2.25rem;
    }

    .landing-subtitle {
        font-size: 1.2rem;
    }

    .landing-description {
        font-size: 1rem;
        margin-bottom: 32px;
    }

    .landing-code-preview {
        max-width: 100%;
        margin-bottom: 36px;
    }

    .landing-features {
        grid-template-columns: repeat(2, 1fr);
    }

    .waitlist-btn {
        text-align: center;
    }

    .landing-humans-inner {
        gap: 6px;
    }

    .human-fig {
        width: 40px;
        height: 80px;
    }

    .human-fig.fig-wide {
        width: 60px;
    }
}

/* Large phone */
@media (max-width: 480px) {
    .landing-main {
        padding: 36px 16px 28px;
    }

    .landing-title {
        font-size: 1.85rem;
    }

    .landing-subtitle {
        font-size: 1.05rem;
    }

    .landing-features {
        gap: 10px;
    }

    .landing-waitlist {
        padding: 28px 20px;
    }

    .landing-waitlist-title {
        font-size: 1.4rem;
    }

    .landing-docs-link {
        font-size: 0.9rem;
        margin-bottom: 32px;
    }

    .human-fig {
        width: 36px;
        height: 72px;
    }

    .human-fig.fig-wide {
        width: 52px;
    }

    /* Hide last 2 figures to reduce crowding */
    .human-fig:nth-child(n+8) {
        display: none;
    }
}

/* Small phone (320-374px) */
@media (max-width: 374px) {
    .landing-header {
        padding: 12px 14px;
    }

    .landing-header .btn {
        padding: 8px 14px;
        font-size: 0.85rem;
    }

    .landing-main {
        padding: 28px 12px 24px;
    }

    .landing-title {
        font-size: 1.6rem;
    }

    .landing-subtitle {
        font-size: 0.95rem;
    }

    .landing-description {
        font-size: 0.92rem;
    }

    .landing-features {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .landing-feature {
        flex-direction: row;
        padding: 12px 14px;
        gap: 12px;
    }

    .landing-feature div {
        text-align: left;
    }

    .landing-waitlist {
        padding: 24px 16px;
    }

    .waitlist-input {
        padding: 12px 14px;
    }

    .waitlist-btn {
        padding: 12px 18px;
        font-size: 0.8rem;
    }

    .human-fig {
        width: 30px;
        height: 60px;
    }

    .human-fig.fig-wide {
        width: 44px;
    }

    /* Show only first 5 figures on very small screens */
    .human-fig:nth-child(n+6) {
        display: none;
    }
}