/* ═══════════════════════════════════════════════════════
   ILMA Design System — style.css
   ═══════════════════════════════════════════════════════ */

/* --- Custom Properties --- */
:root {
    --primary: #534AB7;
    --primary-light: #EEEDFE;
    --teal: #0F6E56;
    --amber: #854F0B;
    --dark: #1a1a2e;
    --bg: #ffffff;
    --code-bg: #1A1A2E;
    --code-text: #C8D6E5;
    --text: #1a1a2e;
    --text-muted: #555;
    --border: #e0e0e0;
    --radius: 8px;
    --radius-lg: 12px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: 'Fira Code', 'Cascadia Code', 'JetBrains Mono', 'Consolas', monospace;
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    text-decoration: underline;
}

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: var(--font);
    border: none;
    background: none;
}

code, pre {
    font-family: var(--mono);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; margin-bottom: 1rem; }
h3 { font-size: 1.4rem; margin-bottom: 0.75rem; }
p { margin-bottom: 1rem; }

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.section-title p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --- Layout --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
    text-decoration: none;
}

.nav-links a.nav-github {
    background: var(--dark);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.nav-links a.nav-github:hover {
    background: #333;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero {
    padding-top: calc(var(--nav-height) + 4rem);
    padding-bottom: 4rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-text h1 {
    color: var(--primary);
    font-size: 4.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    letter-spacing: -2px;
}

.hero-text .tagline {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: opacity 0.2s;
}

.btn:hover {
    text-decoration: none;
    opacity: 0.9;
}

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

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

.btn-teal {
    background: var(--teal);
    color: #fff;
}

/* --- Code Window --- */
.code-window {
    background: var(--code-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.code-window-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
}

.code-window-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.code-window-dot:nth-child(1) { background: #ff5f57; }
.code-window-dot:nth-child(2) { background: #febc2e; }
.code-window-dot:nth-child(3) { background: #28c840; }

.code-window-title {
    color: rgba(255,255,255,0.4);
    font-size: 0.8rem;
    margin-left: 8px;
    font-family: var(--mono);
}

.code-window-body {
    padding: 1.25rem 1.5rem;
    overflow-x: auto;
}

.code-window-body pre {
    color: var(--code-text);
    font-family: var(--mono);
    font-size: 0.9rem;
    line-height: 1.7;
    margin: 0;
}

/* Syntax Highlighting */
.syn-comment { color: #6B7280; font-style: italic; }
.syn-keyword { color: #C084FC; }
.syn-string { color: #86EFAC; }
.syn-number { color: #FCD34D; }
.syn-func { color: #67E8F9; }
.syn-op { color: #F9A8D4; }
.syn-var { color: #C8D6E5; }
.syn-builtin { color: #FCA5A5; }

/* --- Features Section --- */
.features {
    background: var(--primary-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border);
}

.feature-card h3 {
    color: var(--primary);
}

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

/* Keyword table */
.keyword-table {
    width: 100%;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.keyword-table th {
    text-align: left;
    padding: 0.5rem;
    border-bottom: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
}

.keyword-table td {
    padding: 0.4rem 0.5rem;
    border-bottom: 1px solid var(--border);
}

.keyword-table td:first-child {
    font-weight: 600;
    color: var(--primary);
    font-family: var(--mono);
    font-size: 0.85rem;
}

.keyword-table td:last-child {
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.85rem;
}

.module-list {
    margin-top: 0.5rem;
}

.module-list li {
    padding: 0.3rem 0;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.module-list li strong {
    color: var(--text);
}

/* --- Playground Section --- */
.playground {
    background: #f8f8fc;
}

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

.playground-editor-wrap {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--code-bg);
}

.playground-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
}

.playground-header-left {
    display: flex;
    align-items: center;
    gap: 6px;
}

.playground-editor {
    width: 100%;
    min-height: 220px;
    background: var(--code-bg);
    color: var(--code-text);
    border: none;
    padding: 1.25rem 1.5rem;
    font-family: var(--mono);
    font-size: 0.9rem;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    tab-size: 4;
}

.playground-editor::placeholder {
    color: #6B7280;
}

.btn-run {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-run:hover {
    opacity: 0.9;
}

.playground-output-wrap {
    margin-top: 1rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--code-bg);
}

.playground-output-header {
    padding: 10px 16px;
    background: rgba(255,255,255,0.05);
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
    font-weight: 600;
}

.playground-output {
    padding: 1.25rem 1.5rem;
    min-height: 80px;
    color: #86EFAC;
    font-family: var(--mono);
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

.playground-output .error {
    color: #FCA5A5;
}

/* --- Tiers Section --- */
.tiers-tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tier-tab {
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid var(--border);
    color: var(--text-muted);
    background: var(--bg);
    transition: all 0.2s;
}

.tier-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.tier-tab.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.tier-content {
    max-width: 700px;
    margin: 0 auto;
}

.tier-panel {
    display: none;
}

.tier-panel.active {
    display: block;
}

.tier-label {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* --- Knowledge Modules --- */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.module-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    text-align: center;
    transition: border-color 0.2s;
}

.module-card:hover {
    border-color: var(--primary);
}

.module-card .module-emoji {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.module-card h3 {
    color: var(--primary);
    font-family: var(--mono);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

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

/* --- Footer --- */
.footer {
    background: var(--dark);
    color: #ccc;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer h4 {
    color: #fff;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: #aaa;
}

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

.footer ul a {
    color: #aaa;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.footer ul a:hover {
    color: #fff;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #777;
}

/* --- Install Page --- */
.install-hero {
    padding-top: calc(var(--nav-height) + 4rem);
    padding-bottom: 3rem;
    text-align: center;
}

.install-hero h1 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.install-hero p {
    color: var(--text-muted);
    font-size: 1.15rem;
}

.install-tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.install-tab {
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid var(--border);
    color: var(--text-muted);
    background: var(--bg);
    transition: all 0.2s;
}

.install-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.install-tab.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.install-panel {
    display: none;
    max-width: 750px;
    margin: 0 auto;
}

.install-panel.active {
    display: block;
}

.install-method {
    margin-bottom: 2rem;
}

.install-method h3 {
    color: var(--text);
    font-size: 1.05rem;
    margin-bottom: 0.75rem;
}

.install-code-block {
    position: relative;
    background: var(--code-bg);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    padding-right: 3.5rem;
    overflow-x: auto;
}

.install-code-block pre {
    color: var(--code-text);
    font-family: var(--mono);
    font-size: 0.88rem;
    line-height: 1.7;
    margin: 0;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255,255,255,0.1);
    color: #aaa;
    border: none;
    border-radius: 4px;
    padding: 6px 10px;
    font-size: 0.75rem;
    cursor: pointer;
    font-family: var(--font);
    transition: background 0.2s, color 0.2s;
}

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

.copy-btn.copied {
    color: #86EFAC;
}

.install-verify {
    max-width: 750px;
    margin: 3rem auto;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.install-verify h2 {
    margin-bottom: 1rem;
}

.install-extras {
    text-align: center;
    margin-top: 3rem;
}

/* --- Docs Page --- */
.docs-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 3rem;
    padding-top: calc(var(--nav-height) + 2rem);
    padding-bottom: 4rem;
    min-height: 100vh;
}

.docs-sidebar {
    position: sticky;
    top: calc(var(--nav-height) + 1rem);
    align-self: start;
    max-height: calc(100vh - var(--nav-height) - 2rem);
    overflow-y: auto;
    padding-right: 1rem;
}

.docs-sidebar h3 {
    color: var(--primary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.75rem;
}

.docs-sidebar ul {
    margin-bottom: 1.5rem;
}

.docs-sidebar ul li {
    margin-bottom: 2px;
}

.docs-sidebar ul a {
    display: block;
    padding: 0.35rem 0.75rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.docs-sidebar ul a:hover {
    color: var(--primary);
    background: var(--primary-light);
    text-decoration: none;
}

.docs-sidebar ul a.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 600;
}

.docs-sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background: var(--primary);
    color: #fff;
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 1.3rem;
    z-index: 999;
    cursor: pointer;
}

.docs-content {
    max-width: 800px;
}

.docs-section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.docs-section:last-child {
    border-bottom: none;
}

.docs-section h2 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.docs-section h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.docs-section p {
    color: var(--text-muted);
    line-height: 1.7;
}

.docs-section ul {
    margin: 0.5rem 0 1rem 1.5rem;
    list-style: disc;
}

.docs-section ul li {
    color: var(--text-muted);
    margin-bottom: 0.3rem;
    font-size: 0.95rem;
}

.docs-code {
    background: var(--code-bg);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    overflow-x: auto;
}

.docs-code pre {
    color: var(--code-text);
    font-family: var(--mono);
    font-size: 0.88rem;
    line-height: 1.7;
    margin: 0;
}

.docs-note {
    background: var(--primary-light);
    border-left: 3px solid var(--primary);
    padding: 1rem 1.25rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 1rem 0;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.docs-inline-code {
    background: var(--primary-light);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 0.88em;
    color: var(--primary);
}

/* --- Responsive: Tablet (768px) --- */
@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.5rem; }

    .hamburger {
        display: flex;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.open {
        display: flex;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 3.5rem;
    }

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

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

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

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

    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    /* Docs sidebar */
    .docs-layout {
        grid-template-columns: 1fr;
    }

    .docs-sidebar {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg);
        z-index: 998;
        padding: 1.5rem;
        max-height: none;
        overflow-y: auto;
    }

    .docs-sidebar.open {
        display: block;
    }

    .docs-sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* --- Responsive: Small phone (480px) --- */
@media (max-width: 480px) {
    h1 { font-size: 2rem; }

    .hero-text h1 {
        font-size: 2.75rem;
    }

    .hero-text .tagline {
        font-size: 1.05rem;
    }

    section {
        padding: 3rem 0;
    }

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

    .tiers-tabs, .install-tabs {
        flex-direction: column;
        align-items: stretch;
    }

    .tier-tab, .install-tab {
        text-align: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

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

/* --- Responsive: Tiny (320px) --- */
@media (max-width: 320px) {
    .container {
        padding: 0 1rem;
    }

    .hero-text h1 {
        font-size: 2.25rem;
    }

    .code-window-body {
        padding: 1rem;
    }

    .code-window-body pre {
        font-size: 0.8rem;
    }

    .playground-editor {
        font-size: 0.8rem;
        padding: 1rem;
        min-height: 180px;
    }
}