/* ConcreteDesignPy Web App Styles */

:root {
    --primary: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--gray-900);
    background: var(--gray-50);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container { max-width: 1600px; margin: 0 auto; padding: 0 2rem; width: 100%; }

/* Navbar */
.navbar {
    background: var(--primary-dark);
    color: #fff;
    padding: .75rem 0;
    box-shadow: var(--shadow-md);
}
.navbar .container { display: flex; align-items: center; gap: 1rem; }
.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}
.navbar-tag {
    font-size: .75rem;
    background: rgba(255,255,255,.15);
    padding: .15rem .5rem;
    border-radius: 3px;
}

/* Hero */
.hero {
    text-align: center;
    padding: 2.5rem 0 1.5rem;
}
.hero h1 { font-size: 2rem; color: var(--primary-dark); }
.hero p { color: var(--gray-500); margin-top: .25rem; }

/* Calculator Grid */
.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}
.calc-card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-decoration: none;
    color: inherit;
    transition: box-shadow .15s, border-color .15s;
    position: relative;
}
.calc-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}
.calc-card h3 { font-size: 1rem; margin-bottom: .25rem; }
.calc-card p { font-size: .85rem; color: var(--gray-500); }
.calc-category {
    display: inline-block;
    font-size: .65rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: .35rem;
}

/* API info */
.api-info {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}
.api-info h2 { font-size: 1.25rem; margin-bottom: .5rem; }
.api-info p { color: var(--gray-500); font-size: .9rem; margin-bottom: 1rem; }
.api-table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.api-table th, .api-table td {
    text-align: left;
    padding: .4rem .6rem;
    border-bottom: 1px solid var(--gray-200);
}
.api-table th { font-weight: 600; color: var(--gray-700); }
.api-table code {
    background: var(--gray-100);
    padding: .1rem .35rem;
    border-radius: 3px;
    font-size: .8rem;
}

/* Calculator Page */
.calc-page { padding: 1.5rem 0 2rem; }
.calc-page h1 { margin-bottom: .25rem; }
.ref { color: var(--gray-500); font-size: .85rem; margin-bottom: 1.5rem; }
.back-link {
    display: inline-block;
    color: var(--primary);
    text-decoration: none;
    font-size: .85rem;
    margin-bottom: 1rem;
}
.back-link:hover { text-decoration: underline; }

/* Forms */
.calc-form {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.form-section { margin-bottom: 1.25rem; }
.form-section h3 {
    font-size: .9rem;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: .35rem;
    margin-bottom: .75rem;
}
.form-row {
    display: flex;
    gap: .75rem;
    margin-bottom: .5rem;
}
.form-group {
    flex: 1;
    min-width: 0;
}
.form-group label {
    display: block;
    font-size: .8rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: .2rem;
}
.form-group input,
.form-group select {
    width: 100%;
    padding: .4rem .5rem;
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    font-size: .9rem;
    color: var(--gray-900);
    background: #fff;
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(59,130,246,.15);
}
.form-group small { color: var(--gray-500); font-size: .7rem; }

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: .55rem 1.75rem;
    border-radius: 4px;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    padding: .35rem 1rem;
    border-radius: 4px;
    font-size: .8rem;
    cursor: pointer;
    margin-top: .5rem;
}
.btn-secondary:hover { background: var(--gray-200); }

/* Results */
.results-panel {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}
.results-panel h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
}
.result-table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.result-table th, .result-table td {
    text-align: left;
    padding: .35rem .6rem;
    border-bottom: 1px solid var(--gray-100);
}
.result-table th { color: var(--gray-500); font-weight: 500; width: 40%; }
.result-table td { font-family: "SF Mono", "Fira Code", monospace; }

.status-pass { color: var(--success); font-weight: 700; }
.status-fail { color: var(--danger); font-weight: 700; }
.status-warn { color: var(--warning); font-weight: 700; }

canvas { display: block; margin: 0 auto 1rem; background: #fff; }

/* Disclaimer bar */
.disclaimer-bar {
    background: #fef3c7;
    color: #92400e;
    font-size: .75rem;
    text-align: center;
    padding: .35rem 0;
    border-bottom: 1px solid #fcd34d;
    font-weight: 500;
}

/* Split layout (form + preview) */
.split-layout {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}
.split-left { flex: 1; min-width: 0; }
.split-right { width: 320px; flex-shrink: 0; }

/* Results split (SVG + content) */
.results-split {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
}
.results-diagram {
    flex: 1;
    min-width: 260px;
    text-align: center;
}
.results-diagram svg {
    max-width: 100%;
    height: auto;
}

/* Report panel */
.report-panel {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-top: 1rem;
}
.mathjax-report p { margin-bottom: .5rem; }

/* Preview panel */
.preview-panel {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1rem;
    position: sticky;
    top: 1rem;
}
.preview-panel h3 {
    font-size: .9rem;
    color: var(--gray-700);
    margin-bottom: .75rem;
}
.hint {
    font-size: .7rem;
    color: var(--gray-500);
    margin-top: .5rem;
    text-align: center;
}

/* Remove button */
.btn-remove {
    background: none;
    border: 1px solid var(--danger);
    color: var(--danger);
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    align-self: flex-end;
    margin-bottom: .15rem;
    flex-shrink: 0;
}
.btn-remove:hover { background: #fef2f2; }

/* Footer */
.footer {
    margin-top: auto;
    background: var(--gray-100);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 0;
    text-align: center;
    font-size: .8rem;
    color: var(--gray-500);
}
.disclaimer { font-style: italic; font-size: .7rem; margin-top: .25rem; }

/* Loading */
.loading { text-align: center; padding: 2rem; color: var(--gray-500); }
.error-msg { color: var(--danger); background: #fef2f2; padding: .75rem; border-radius: 4px; }

/* Column calculator layout */
.col-layout {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}
.col-layout-form { flex: 0 0 480px; min-width: 0; }
.col-layout-results { flex: 1; min-width: 0; }
.col-layout-results .results-panel { position: sticky; top: 1rem; }

/* Rebar mode toggle */
.rebar-mode-toggle {
    float: right;
    font-size: .8rem;
    font-weight: 400;
}
.rebar-mode-toggle label { margin-left: .5rem; cursor: pointer; }
.rebar-mode-toggle input[type="radio"] { margin-right: .15rem; }

/* Rebar editor table */
.rebar-table-wrap { max-height: 320px; overflow-y: auto; border: 1px solid var(--gray-200); border-radius: 4px; }
.rebar-edit-table { width: 100%; border-collapse: collapse; font-size: .8rem; }
.rebar-edit-table th {
    position: sticky; top: 0; background: var(--gray-100);
    padding: .3rem .4rem; text-align: center; font-weight: 600;
    color: var(--gray-700); border-bottom: 1px solid var(--gray-300);
}
.rebar-edit-table td { padding: .2rem .3rem; text-align: center; border-bottom: 1px solid var(--gray-100); }
.rebar-edit-table input {
    width: 80px; padding: .2rem .3rem; border: 1px solid var(--gray-300);
    border-radius: 3px; font-size: .8rem; text-align: right;
}
.rebar-edit-table input:focus {
    outline: none; border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(59,130,246,.15);
}

/* Report headings */
.mathjax-report h4 {
    font-size: .9rem; color: var(--primary-dark);
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: .25rem; margin: 1rem 0 .5rem;
}

/* Handsontable overrides */
#load-combo-table .handsontable { font-size: .82rem; }
#load-combo-table .handsontable th { font-size: .75rem; }