/* 01-foundation.css: tokens, reset, typography, container, buttons, badges, forms.
   FILE ORDER IS CASCADE ORDER across the numbered stylesheets. */

:root {
    /* surfaces */
    --bg: #F7FAFC;             /* page background, near-white with cool cast */
    --bg-card: #FFFFFF;
    --bg-subtle: #EFF6FB;      /* light blue tint for alt sections, table stripes */
    --border: #D9E4EE;
    --border-strong: #B7C9D9;

    /* brand blues */
    --brand-900: #0B3C5D;      /* deep navy: headings, footer bg, primary hover */
    --brand-700: #14567F;
    --brand-600: #1B6FA8;      /* primary actions, links */
    --brand-500: #2389CE;      /* primary buttons */
    --brand-200: #A8D4F0;
    --brand-100: #D6EAF8;      /* badges, highlights */
    --brand-50:  #EAF4FB;

    /* text (AA+ on white) */
    --text: #17222B;           /* ~15.6:1 on white */
    --text-secondary: #45586A; /* ~7.4:1 */
    --text-muted: #5E7183;     /* ~5.3:1, min size 14px */
    --text-on-brand: #FFFFFF;  /* on brand-500/600/900 */

    /* semantic */
    --success: #157F3D;  --success-bg: #E4F5EA;
    --warning: #8A5A00;  --warning-bg: #FFF3D6;
    --danger:  #B42318;  --danger-bg:  #FDE8E6;

    /* condition badge palette (fixed, used everywhere) */
    --cond-new: #157F3D;         /* green */
    --cond-refurb: #1B6FA8;      /* brand blue */
    --cond-a: #14567F;
    --cond-b: #8A5A00;           /* amber */
    --cond-c: #A34A00;
    --cond-asis: #5E7183;        /* gray */

    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --radius: 10px; --radius-sm: 6px;
    --shadow-card: 0 1px 3px rgba(11,60,93,.08), 0 4px 14px rgba(11,60,93,.06);
    --container-max: 1280px;
    --section-px: 20px;         /* 32px at >=768px */
}

/* ---------- reset ---------- */

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

* {
    margin: 0;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

img, picture, svg, video {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

/* ---------- typography ---------- */

h1, h2, h3, h4, h5, h6 {
    color: var(--brand-900);
    line-height: 1.25;
    font-weight: 700;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }

p {
    color: var(--text-secondary);
}

a {
    color: var(--brand-600);
    text-decoration: none;
}

a:hover {
    color: var(--brand-700);
    text-decoration: underline;
}

code {
    background: var(--bg-subtle);
    border-radius: var(--radius-sm);
    padding: 2px 6px;
    font-size: 0.9em;
}

/* visible focus for every interactive element (WCAG) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--brand-500);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ---------- container + sections ---------- */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--section-px);
    padding-right: var(--section-px);
}

.section {
    padding-top: 40px;
    padding-bottom: 40px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 24px;
}

@media (min-width: 768px) {
    :root {
        --section-px: 32px;
    }
}

/* ---------- buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background: var(--brand-500);
    color: var(--text-on-brand);
}

.btn-primary:hover {
    background: var(--brand-900);
    color: var(--text-on-brand);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--brand-600);
    border-color: var(--border-strong);
}

.btn-secondary:hover {
    border-color: var(--brand-600);
    color: var(--brand-700);
}

.btn-ghost {
    background: transparent;
    color: var(--brand-600);
}

.btn-ghost:hover {
    background: var(--brand-50);
    color: var(--brand-700);
}

.btn-danger {
    background: var(--danger);
    color: var(--text-on-brand);
}

.btn-danger:hover {
    background: #8E1B12;
    color: var(--text-on-brand);
}

.btn-full {
    width: 100%;
}

/* ---------- badges ---------- */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    background: var(--brand-100);
    color: var(--brand-700);
}

.status-badge.success { background: var(--success-bg); color: var(--success); }
.status-badge.warning { background: var(--warning-bg); color: var(--warning); }
.status-badge.danger  { background: var(--danger-bg);  color: var(--danger); }

.condition-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    color: #FFFFFF;
}

.condition-badge.condition-new    { background: var(--cond-new); }
.condition-badge.condition-refurb { background: var(--cond-refurb); }
.condition-badge.condition-a      { background: var(--cond-a); }
.condition-badge.condition-b      { background: var(--cond-b); }
.condition-badge.condition-c      { background: var(--cond-c); }
.condition-badge.condition-asis   { background: var(--cond-asis); }

/* ---------- forms ---------- */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
    flex: 1;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
}

.form-input {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    border-color: var(--brand-500);
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.form-hint-inline {
    font-weight: 400;
    color: var(--text-muted);
    font-size: 0.85em;
}

.form-row {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.form-checkbox {
    width: 16px;
    height: 16px;
    accent-color: var(--brand-500);
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success);
}

/* ---------- loading state (fingerprint-loop loader) ---------- */

.loading-state {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 48px 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.loading-state::before {
    content: "";
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 3px solid var(--brand-100);
    border-top-color: var(--brand-500);
    animation: bs-spin 0.9s linear infinite;
}

@keyframes bs-spin {
    to { transform: rotate(360deg); }
}