/* Base Reset & Variables */
:root {
    --bg: #FDF8F0;
    --surface: #FFFBF5;
    --text: #3A2E20;
    --text-muted: #6B5D4F;
    --accent: #8B5E3C;
    --accent-hover: #A0724A;
    --danger: #C0392B;
    --border: #D4C4B0;
    --shadow: 0 2px 8px rgba(58, 46, 32, 0.08);
    --radius: 10px;
    --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --max-width: 1040px;
}

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

html {
    font-size: 17px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 10px;
    background: var(--accent);
    color: #fff;
    padding: 8px 16px;
    border-radius: 4px;
    z-index: 100;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 10px;
}

/* Header */
.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 10;
}
.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--accent);
    font-weight: 700;
    font-size: 1.2rem;
}
.logo-icon {
    flex-shrink: 0;
}
.nav-list {
    list-style: none;
    display: flex;
    gap: 20px;
}
.nav-list a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.15s;
}
.nav-list a:hover,
.nav-list a:focus {
    border-bottom-color: var(--accent);
}

/* Main */
main {
    flex: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 24px 16px 40px;
    width: 100%;
}

/* Intro */
.intro-section {
    text-align: center;
    margin-bottom: 32px;
}
.intro-content h1 {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}
.intro-sub {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--text);
    border-bottom: 2px solid var(--border);
    padding-bottom: 6px;
}

/* Planner Layout */
.planner-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.controls-panel,
.results-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.control-group {
    margin-bottom: 16px;
}
.control-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 0.95rem;
}
.control-group select,
.control-group input[type="range"] {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    background: #fff;
    font-family: inherit;
}
.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}
.btn {
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s;
    font-family: inherit;
}
.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover,
.btn-primary:focus {
    background: var(--accent-hover);
}
.btn-secondary {
    background: #fff;
    border-color: var(--border);
    color: var(--text);
}
.btn-secondary:hover,
.btn-secondary:focus {
    background: #F5EDE3;
}

.feedback-message {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--accent);
    min-height: 1.2em;
}

/* Result Card */
.result-card {
    margin-bottom: 16px;
}
.result-title {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--accent);
}
.result-values {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.result-item {
    display: flex;
    flex-direction: column;
}
.result-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.result-number {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
}
.result-range {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.angle-visual {
    margin-top: 8px;
    background: #FDF5EB;
    border-radius: 6px;
    padding: 8px;
}
.angle-svg {
    width: 100%;
    max-height: 140px;
}

.prep-steps {
    background: #F9F3EA;
    border-radius: 6px;
    padding: 12px 16px;
}
.prep-steps h4 {
    font-size: 0.95rem;
    margin-bottom: 6px;
}
.prep-steps ol {
    padding-left: 20px;
    font-size: 0.9rem;
    color: var(--text);
}
.prep-steps li {
    margin-bottom: 4px;
}

/* Comparison */
.comparison-section {
    margin-bottom: 32px;
}
.compare-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.compare-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}
.compare-card h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: var(--accent);
}
.compare-card p {
    font-size: 0.9rem;
    margin-bottom: 4px;
}
.compare-card .control-group {
    margin-bottom: 10px;
}

/* Saved */
.saved-section {
    margin-bottom: 32px;
}
.saved-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
}
.saved-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 14px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.saved-item button {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
}
.empty-state {
    color: var(--text-muted);
    font-style: italic;
}

/* Content Guide */
.content-section {
    margin-bottom: 24px;
}
.guide-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.guide-block {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
}
.guide-block h3 {
    font-size: 1.05rem;
    margin-bottom: 6px;
    color: var(--accent);
}
.guide-block p,
.guide-block li {
    font-size: 0.9rem;
    color: var(--text);
}
.mistake-list {
    list-style: none;
    padding: 0;
}
.mistake-list li {
    margin-bottom: 8px;
    padding-left: 16px;
    position: relative;
}
.mistake-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* Footer */
.site-footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 16px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.footer-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 6px;
}
.footer-links a,
.footer-ecosystem a {
    color: var(--accent);
    text-decoration: none;
}
.footer-links a:hover,
.footer-ecosystem a:hover {
    text-decoration: underline;
}
.footer-version {
    margin-top: 4px;
    font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 700px) {
    .planner-layout,
    .compare-layout,
    .guide-layout {
        grid-template-columns: 1fr;
    }
    .intro-content h1 {
        font-size: 1.5rem;
    }
    .result-values {
        flex-direction: column;
        gap: 12px;
    }
    .action-buttons {
        flex-direction: column;
    }
}

@media print {
    .site-header,
    .site-footer,
    .action-buttons,
    .saved-section,
    .comparison-section,
    .skip-link {
        display: none;
    }
    body {
        background: #fff;
        color: #000;
    }
    .planner-layout {
        grid-template-columns: 1fr;
    }
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}