/* ForgePlus — industrial light theme */
:root {
    --fp-steel: #2C3440;        /* dark steel grey, primary text + navbar */
    --fp-steel-dark: #1B2129;
    --fp-amber: #D97706;        /* hot-metal amber, accent + active states */
    --fp-amber-dark: #B45309;
    --fp-bg: #F8F7F4;           /* warm off-white app background */
    --fp-card: #FFFFFF;
    --fp-border: #E2DFD8;
    --fp-muted: #6B7280;
    --fp-success: #047857;
    --fp-warning: #B45309;
    --fp-danger: #B91C1C;
}

body.fp-body {
    background-color: var(--fp-bg);
    color: var(--fp-steel);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.fp-main { flex: 1; }

.fp-mono { font-family: 'JetBrains Mono', 'Consolas', monospace; }

/* Navbar */
.fp-navbar {
    background-color: var(--fp-steel);
    color: #fff;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
.fp-navbar .navbar-brand,
.fp-navbar .nav-link {
    color: #E5E7EB;
}
.fp-navbar .nav-link.active,
.fp-navbar .nav-link:hover {
    color: var(--fp-amber);
}
.fp-brand {
    font-weight: 700;
    letter-spacing: 0.5px;
}
.fp-brand-mark {
    color: var(--fp-amber);
    font-size: 1.2em;
}

/* Cards */
.fp-card {
    background: var(--fp-card);
    border: 1px solid var(--fp-border);
    border-radius: 6px;
    padding: 1.25rem;
    margin-bottom: 1rem;
}
.fp-card h2, .fp-card h3, .fp-card h4 {
    color: var(--fp-steel);
    font-weight: 600;
}
.fp-card .fp-card-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--fp-muted);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn-fp-primary {
    background-color: var(--fp-amber);
    color: #fff;
    border: none;
}
.btn-fp-primary:hover {
    background-color: var(--fp-amber-dark);
    color: #fff;
}
.btn-fp-secondary {
    background-color: #fff;
    color: var(--fp-steel);
    border: 1px solid var(--fp-border);
}
.btn-fp-secondary:hover {
    background-color: #f4f3f0;
}

/* Tabs */
.fp-tabs {
    border-bottom: 2px solid var(--fp-border);
    margin-bottom: 1.5rem;
}
.fp-tabs .nav-link {
    color: var(--fp-muted);
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.6rem 1.1rem;
    font-weight: 500;
    font-size: 0.95rem;
}
.fp-tabs .nav-link.active {
    color: var(--fp-amber);
    border-bottom-color: var(--fp-amber);
    background: transparent;
}
.fp-tabs .nav-link:hover {
    color: var(--fp-steel);
}

/* Tables */
.fp-table {
    width: 100%;
    border-collapse: collapse;
}
.fp-table th, .fp-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--fp-border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}
.fp-table th {
    text-align: left;
    color: var(--fp-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.5px;
    background: #FAF9F6;
}

/* Prediction band display */
.fp-prediction {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
}
.fp-prediction .value {
    color: var(--fp-steel);
    font-size: 1.1em;
}
.fp-prediction .band {
    color: var(--fp-muted);
    font-size: 0.95em;
}
.fp-prediction .unit {
    color: var(--fp-muted);
    margin-left: 4px;
}
.fp-prediction-info {
    color: var(--fp-muted);
    cursor: help;
    font-size: 0.85em;
}

/* Footer */
.fp-footer {
    background: var(--fp-steel-dark);
    color: #9CA3AF;
    border-top: 1px solid #000;
}

/* Login page */
.fp-login-card {
    max-width: 380px;
    margin: 4rem auto;
    background: var(--fp-card);
    padding: 2rem;
    border: 1px solid var(--fp-border);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}
.fp-login-brand {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--fp-steel);
}
.fp-login-brand .mark {
    color: var(--fp-amber);
    font-size: 2.2rem;
}
.fp-login-brand h1 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin: 0.5rem 0 0.25rem;
}
.fp-login-brand p {
    color: var(--fp-muted);
    font-size: 0.85rem;
    margin: 0;
}

/* Sidebar list + detail (grade catalog) */
.fp-sidebar-list {
    background: var(--fp-card);
    border: 1px solid var(--fp-border);
    border-radius: 6px;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
}
.fp-sidebar-list .list-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--fp-border);
    text-decoration: none;
    color: var(--fp-steel);
    display: block;
    transition: background 0.1s;
}
.fp-sidebar-list .list-item:last-child { border-bottom: none; }
.fp-sidebar-list .list-item:hover {
    background: #FAF9F6;
}
.fp-sidebar-list .list-item.active {
    background: #FEF3E2;
    border-left: 3px solid var(--fp-amber);
    padding-left: calc(1rem - 3px);
}
.fp-sidebar-list .list-item .grade-name {
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
}
.fp-sidebar-list .list-item .grade-family {
    font-size: 0.78rem;
    color: var(--fp-muted);
}

/* Form helpers */
.fp-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}
.fp-form label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--fp-muted);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    margin-bottom: 0.3rem;
    display: block;
}

/* N/A banner */
.fp-na-banner {
    background: #FEF3E2;
    border: 1px solid #FDE4B0;
    color: var(--fp-amber-dark);
    padding: 1rem 1.25rem;
    border-radius: 6px;
    font-size: 0.92rem;
}

/* Sticky save bar */
.fp-save-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--fp-bg);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--fp-border);
    margin-bottom: 1rem;
}