@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
    --color-paper: #F4F5F3;
    --color-paper-raised: #FFFFFF;
    --color-ink: #10161D;
    --color-ink-muted: #4B5563;
    --color-ink-faint: #8A9099;
    --color-line: #DADCD8;
    --color-line-strong: #B7BAB4;
    --color-blueprint: #1D3557;
    --color-blueprint-hover: #152740;
    --color-blueprint-light: #EEF2F6;
    --color-rust: #B45536;
    --color-rust-light: #FBF1EC;
    --color-success: #2F6F4E;
    --color-success-light: #ECFDF5;
    --color-danger: #A3312A;
    --color-danger-light: #FDF4F4;
    
    --shadow-panel: 0 1px 2px rgba(16, 22, 29, 0.04), 0 1px 0 rgba(16, 22, 29, 0.03);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--color-paper);
    color: var(--color-ink);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
    background: var(--color-paper-raised);
    border-bottom: 1px solid var(--color-line);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1152px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 6px;
    text-decoration: none;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-ink);
}

.logo-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-blueprint);
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink-muted);
    padding: 8px 12px;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
}

.nav-link:hover {
    background: var(--color-paper);
    color: var(--color-ink);
}

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

/* Hero Section (index.php) */
.hero {
    min-height: 420px;
    display: flex;
    align-items: center;
    padding: 80px 24px;
    background: linear-gradient(135deg, var(--color-ink), var(--color-blueprint));
    color: white;
    border-bottom: 1px solid var(--color-line);
}

.hero-content {
    max-width: 850px;
    margin: 0 auto;
    width: 100%;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 12px;
    font-weight: 700;
    color: var(--color-line-strong);
    margin-bottom: 12px;
}

.hero .eyebrow {
    color: #60a5fa; /* Keep it light blue on dark hero */
}

h1 {
    margin: 0;
    font-size: 48px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.subtitle {
    font-size: 18px;
    line-height: 1.6;
    color: #dbeafe;
    max-width: 760px;
    margin: 16px 0;
}

.credit {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-paper);
    margin-bottom: 24px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Page Header (predict.php) */
.page-header {
    background: var(--color-paper-raised);
    border-bottom: 1px solid var(--color-line);
    padding: 48px 24px;
    margin-bottom: 32px;
}

.page-header-content {
    max-width: 1152px;
    margin: 0 auto;
}

.page-header h1 {
    font-size: 36px;
    color: var(--color-ink);
    margin-bottom: 8px;
}

.page-header .subtitle {
    color: var(--color-ink-muted);
    font-size: 16px;
    margin: 0;
}

.page-header .credit {
    color: var(--color-ink-faint);
    margin-top: 12px;
    margin-bottom: 0;
    font-size: 13px;
}

/* Main layouts */
main {
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 24px 48px;
}

.grid-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.predict-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
}

/* Cards & Containers */
.card,
.form-card {
    background: var(--color-paper-raised);
    border: 1px solid var(--color-line);
    border-radius: 4px;
    padding: 24px;
    box-shadow: var(--shadow-panel);
}

.card h2 {
    margin-top: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--color-ink);
}

.card p {
    color: var(--color-ink-muted);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 0;
}

/* Forms */
.input-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-ink);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

label span {
    color: var(--color-ink-faint);
    font-weight: 400;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
}

input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-line);
    border-radius: 4px;
    font-family: inherit;
    font-size: 14px;
    background: var(--color-paper-raised);
    color: var(--color-ink);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus {
    border-color: var(--color-line-strong);
    box-shadow: 0 0 0 2px var(--color-blueprint-light);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--color-blueprint);
    color: white;
    border: 1px solid var(--color-blueprint);
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.2s, border-color 0.2s;
}

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

.btn.secondary {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: white;
}

.btn.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn.full {
    width: 100%;
    margin-top: 16px;
}

.back {
    display: inline-block;
    margin-bottom: 24px;
    color: var(--color-blueprint);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

.back:hover {
    text-decoration: underline;
}

/* Result Elements */
.result-placeholder {
    border: 1px dashed var(--color-line-strong);
    border-radius: 4px;
    min-height: 320px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 32px;
    color: var(--color-ink-faint);
    font-size: 14px;
    text-align: center;
}

.result-display {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.result-card {
    background: var(--color-paper-raised);
    border: 1px solid var(--color-line);
    border-radius: 4px;
    padding: 20px;
    box-shadow: var(--shadow-panel);
}

.result-card.full-width {
    grid-column: span 2;
}

.card-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-ink-faint);
    margin: 0 0 8px 0;
}

.card-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-ink);
    margin: 0;
}

.card-unit {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 400;
    color: var(--color-ink-muted);
    margin-left: 6px;
}

.card-sublabel {
    font-size: 12px;
    color: var(--color-ink-faint);
    margin: 6px 0 0 0;
}

/* Status details within cards */
.status-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.status-note {
    font-size: 13px;
    color: var(--color-ink-muted);
    margin: 0;
}

.status-warnings {
    margin: 0;
    padding-left: 0;
    list-style: none;
}

.status-warnings li {
    font-size: 13px;
    color: var(--color-rust);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Collapsible Section */
.raw-response-details {
    border: 1px solid var(--color-line);
    background: var(--color-paper-raised);
    border-radius: 4px;
    overflow: hidden;
}

.raw-response-details summary {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-ink-muted);
    padding: 12px 16px;
    background: var(--color-paper-raised);
    cursor: pointer;
    outline: none;
    user-select: none;
    border-bottom: 1px solid transparent;
}

.raw-response-details[open] summary {
    border-bottom: 1px solid var(--color-line);
}

.raw-response-details summary:hover {
    background: var(--color-blueprint-light);
    color: var(--color-ink);
}

.raw-response-details pre {
    margin: 0;
    padding: 16px;
    background: var(--color-paper);
    border-radius: 0;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    line-height: 1.6;
    color: var(--color-ink);
}

/* Error Card */
.result-error {
    background: var(--color-danger-light);
    border: 1px solid var(--color-danger);
    border-radius: 4px;
    padding: 24px;
    color: var(--color-danger);
}

.result-error h3 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 16px;
    font-weight: 700;
}

.error-msg {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    margin: 0 0 16px 0;
    white-space: pre-wrap;
    word-break: break-all;
}

.result-error .hint {
    font-size: 12px;
    color: var(--color-ink-muted);
    margin: 0;
    border-top: 1px solid rgba(163, 49, 42, 0.2);
    padding-top: 12px;
}

/* Footer styling */
footer {
    border-top: 1px solid var(--color-line);
    padding: 32px 24px;
    margin-top: auto;
    background: var(--color-paper-raised);
}

.footer-content {
    max-width: 1152px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--color-ink-faint);
}

.footer-content p {
    margin: 0;
}

/* Responsive design */
@media (max-width: 768px) {
    h1 {
        font-size: 32px;
    }
    
    .page-header h1 {
        font-size: 28px;
    }
    
    .grid-section {
        grid-template-columns: 1fr;
    }
    
    .predict-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .input-grid {
        grid-template-columns: 1fr;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .result-card.full-width {
        grid-column: span 1;
    }
    
    .nav-container {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
        padding: 16px;
    }
    
    .nav-links {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 4px;
    }
    
    .nav-link {
        padding: 6px 10px;
        font-size: 13px;
        white-space: nowrap;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}