/**
 * HitungPintar - Clean, Lightweight, Anti-Slop Local Stylesheet
 * 100% Standalone - Zero External CDN Dependencies
 */

/* Import Local Font: Plus Jakarta Sans (Self-Hosted WOFF2) */
@font-face {
    font-family: 'Plus Jakarta Sans';
    font-style: normal;
    font-weight: 400 800;
    font-display: swap;
    src: url('../fonts/plus-jakarta-sans.woff2') format('woff2');
}

:root {
    --bg-main: #f8fafc;
    --bg-surface: #ffffff;
    --bg-muted: #f1f5f9;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-light: #e0f2fe;
    --success: #059669;
    --success-light: #ecfdf5;
    --danger: #e11d48;
    --danger-light: #ffe4e6;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --font-stack: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

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

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1160px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}

.container-narrow {
    max-width: 800px;
}

/* Header & Navigation */
.site-header {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text-primary);
}

.brand-icon {
    width: 36px;
    height: 36px;
    background-color: var(--text-primary);
    color: #ffffff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: background-color 0.15s, color 0.15s;
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-muted);
}

.btn-primary-sm {
    padding: 7px 14px;
    background-color: var(--accent);
    color: #ffffff !important;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
}

.btn-primary-sm:hover {
    background-color: var(--accent-hover);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .mobile-toggle {
        display: block;
    }
}

.mobile-menu-drawer {
    display: none;
    padding: 12px 0 16px;
    border-top: 1px solid var(--border-color);
}

.mobile-menu-drawer.show {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Hero Section */
.hero-section {
    padding: 48px 0 36px;
    text-align: center;
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
}

.badge-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background-color: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.hero-title {
    font-size: clamp(1.8rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.hero-lead {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 28px;
}

/* Search Bar */
.search-wrapper {
    max-width: 520px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 12px 16px 12px 42px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    background-color: #ffffff;
    font-size: 0.95rem;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.search-icon-pos {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* Section Header */
.section-title-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.section-icon-box {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background-color: var(--bg-muted);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.section-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Tool Cards Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.tool-card {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

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

.tool-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background-color: var(--bg-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: 14px;
}

.tool-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.tool-card-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.tool-card-action {
    margin-top: 18px;
    padding-top: 12px;
    border-top: 1px solid var(--bg-muted);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Interactive Tool Page */
.page-wrapper {
    padding: 32px 0 60px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.tool-header {
    margin-bottom: 28px;
}

.tool-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.tool-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Tool Interface Box */
.tool-box {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}

.tool-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

@media (max-width: 768px) {
    .tool-grid-2 {
        grid-template-columns: 1fr;
    }
}

/* Form Controls */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.input-text, .input-select, .input-textarea {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: #ffffff;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.input-text:focus, .input-select:focus, .input-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: background-color 0.15s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

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

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

.btn-secondary {
    background-color: var(--bg-muted);
    color: var(--text-secondary);
}

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

.btn-block {
    width: 100%;
}

/* Result Box */
.result-panel {
    background-color: #0f172a;
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.result-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94a3b8;
}

.result-value-lg {
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    font-weight: 800;
    color: #ffffff;
    margin: 6px 0 16px;
    font-variant-numeric: tabular-nums;
}

.result-breakdown {
    border-top: 1px solid #1e293b;
    padding-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.85rem;
}

.result-row {
    display: flex;
    justify-content: space-between;
    color: #cbd5e1;
}

.result-row strong {
    color: #ffffff;
}

/* Documentation / Content Article Box */
.doc-box {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
}

.doc-box h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.doc-box h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 18px;
    margin-bottom: 8px;
}

.doc-box ul, .doc-box ol {
    padding-left: 20px;
    margin-bottom: 16px;
}

.doc-box li {
    margin-bottom: 6px;
}

.code-box {
    background-color: var(--bg-muted);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--text-primary);
    margin: 12px 0;
}

/* Footer */
.site-footer {
    background-color: #0f172a;
    color: #94a3b8;
    margin-top: auto;
    border-top: 1px solid #1e293b;
    padding: 48px 0 24px;
    font-size: 0.88rem;
}

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

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-heading {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #ffffff;
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.8rem;
}

/* Toast */
#toast-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    background-color: #0f172a;
    color: #ffffff;
    border: 1px solid #334155;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-md);
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
    pointer-events: none;
}

#toast-notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Simple Alert Boxes */
.alert-box {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.alert-success {
    background-color: var(--success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-danger {
    background-color: var(--danger-light);
    color: #9f1239;
    border: 1px solid #fecdd3;
}