/*
 * ARXEDO Academy Global Design System
 * Sprint 3 establishes reusable foundation classes while preserving existing views.
 */

:root {
    --aa-navy: #0f172a;
    --aa-navy-2: #1e293b;
    --aa-text: #111827;
    --aa-muted: #667085;
    --aa-line: #d7dee8;
    --aa-bg: #ffffff;
    --aa-bg-soft: #f8fafc;
    --aa-blue: #155eef;
    --aa-blue-dark: #0b3b95;
    --aa-blue-soft: #eaf1ff;
    --aa-teal: #0e9384;
    --aa-success: #087443;
    --aa-success-bg: #ecfdf3;
    --aa-warning: #b54708;
    --aa-warning-bg: #fffaeb;
    --aa-danger: #b42318;
    --aa-danger-bg: #fef3f2;
    --aa-info-bg: #eef4ff;
    --aa-radius: 8px;
    --aa-shadow-sm: 0 1px 2px rgba(17, 24, 39, .06);
    --aa-shadow: 0 18px 45px rgba(17, 24, 39, .08);
    --aa-space-1: 6px;
    --aa-space-2: 10px;
    --aa-space-3: 14px;
    --aa-space-4: 18px;
    --aa-space-5: 24px;
    --aa-space-6: 32px;
    --aa-space-7: 48px;
    --aa-space-8: 72px;
    --aa-max: 1180px;
}

body { color: var(--aa-text); background: var(--aa-bg); font-size: 16px; line-height: 1.6; }
.aa-container, .container { width: min(var(--aa-max), calc(100% - 32px)); }
.aa-section { margin-top: var(--aa-space-8); }
.aa-section-header { display: grid; gap: var(--aa-space-2); margin-bottom: var(--aa-space-5); }

h1, .aa-h1 { color: var(--aa-navy); font-size: clamp(42px, 6vw, 72px); line-height: 1; letter-spacing: 0; }
h2, .aa-h2 { color: var(--aa-navy); font-size: clamp(28px, 4vw, 44px); line-height: 1.12; letter-spacing: 0; }
h3, .aa-h3 { color: var(--aa-navy); font-size: 22px; line-height: 1.22; }
h4, .aa-h4 { color: var(--aa-navy-2); font-size: 18px; line-height: 1.3; }
.aa-body { color: var(--aa-text); font-size: 16px; line-height: 1.65; }
.aa-small, .muted { color: var(--aa-muted); font-size: 14px; }
.aa-caption, .eyebrow { color: var(--aa-teal); font-size: 12px; font-weight: 850; letter-spacing: 0; text-transform: uppercase; }
.aa-meta, .meta-row { color: var(--aa-muted); font-size: 14px; }

a:focus-visible, button:focus-visible, .button:focus-visible, .aa-button:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
    outline: 3px solid rgba(21, 94, 239, .28);
    outline-offset: 2px;
}

.aa-button, .button, button {
    min-height: 44px;
    border-radius: 6px;
    font-weight: 850;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease, box-shadow .15s ease;
}
.aa-button, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 18px; text-decoration: none; }
.aa-button--primary, .button:not(.secondary):not(.ghost), button:not(.secondary):not(.danger):not(.success) { background: var(--aa-blue); color: #fff; box-shadow: var(--aa-shadow-sm); }
.aa-button--primary:hover, .button:not(.secondary):not(.ghost):hover, button:not(.secondary):not(.danger):not(.success):hover { background: var(--aa-blue-dark); text-decoration: none; }
.aa-button--secondary, .button.secondary, button.secondary { background: var(--aa-blue-soft); color: var(--aa-blue-dark); }
.aa-button--ghost, .button.ghost { background: transparent; border: 1px solid currentColor; color: var(--aa-blue-dark); }
.aa-button--danger, button.danger { background: var(--aa-danger); color: #fff; }
.aa-button--success, button.success { background: var(--aa-success); color: #fff; }
.aa-button[disabled], .aa-button.is-disabled, button:disabled, .button[aria-disabled="true"] { opacity: .58; cursor: not-allowed; pointer-events: none; }
.aa-button.is-loading::after, button.is-loading::after { content: ""; width: 14px; height: 14px; border-radius: 999px; border: 2px solid currentColor; border-right-color: transparent; }

.aa-card, .premium-card, .training-card, .card, .panel, .auth-card, .course-card, .certificate-card, .empty-state, .stats article, .stat {
    background: var(--aa-bg);
    border: 1px solid rgba(215, 222, 232, .95);
    border-radius: var(--aa-radius);
    box-shadow: var(--aa-shadow-sm);
}
.aa-card--elevated, .premium-card, .training-card { box-shadow: var(--aa-shadow); }
.aa-card--feature, .aa-card--training, .aa-card--dashboard, .aa-card--admin, .aa-card--certificate { padding: var(--aa-space-5); }
.aa-stat, .stat, .stats article { padding: var(--aa-space-5); }

.aa-badge, .badge {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 0 9px;
    border-radius: 999px;
    background: var(--aa-info-bg);
    color: var(--aa-blue-dark);
    font-size: 12px;
    font-weight: 850;
}
.aa-badge--beginner, .aa-badge--b2c, .badge.success { background: var(--aa-success-bg); color: var(--aa-success); }
.aa-badge--intermediate, .aa-badge--updated, .badge.warning { background: var(--aa-warning-bg); color: var(--aa-warning); }
.aa-badge--advanced, .aa-badge--professional, .aa-badge--b2b { background: #eef4ff; color: var(--aa-blue-dark); }
.aa-badge--new, .aa-badge--certificate { background: #ecfdf3; color: var(--aa-success); }

.aa-form-group { display: grid; gap: 7px; }
label, .aa-form-label { color: var(--aa-navy-2); font-weight: 800; }
input, select, textarea, .aa-input, .aa-select, .aa-textarea, .aa-file {
    min-height: 44px;
    border: 1px solid var(--aa-line);
    border-radius: 6px;
    background: #fff;
    color: var(--aa-text);
    font: inherit;
}
textarea, .aa-textarea { min-height: 120px; }
.check, .aa-checkbox, .aa-radio { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.aa-help { color: var(--aa-muted); font-size: 13px; }
.aa-error-text { color: var(--aa-danger); font-size: 13px; font-weight: 750; }

.aa-alert, .alert { border-radius: 6px; padding: 12px 14px; border: 1px solid; }
.aa-alert--info { color: var(--aa-blue-dark); background: var(--aa-info-bg); border-color: #c7d7fe; }
.aa-alert--success, .alert.success { color: var(--aa-success); background: var(--aa-success-bg); border-color: #abefc6; }
.aa-alert--warning { color: var(--aa-warning); background: var(--aa-warning-bg); border-color: #fedf89; }
.aa-alert--error, .alert.error { color: var(--aa-danger); background: var(--aa-danger-bg); border-color: #fecdca; }

.aa-table-wrap, .table-wrap { overflow: auto; border: 1px solid var(--aa-line); border-radius: var(--aa-radius); background: #fff; box-shadow: var(--aa-shadow-sm); }
.aa-table, table { width: 100%; border-collapse: collapse; }
th { background: var(--aa-bg-soft); color: var(--aa-navy-2); font-size: 13px; text-transform: uppercase; }
th, td { padding: 13px 14px; border-bottom: 1px solid var(--aa-line); }
.aa-table-empty, .table-empty { color: var(--aa-muted); text-align: center; padding: 28px 14px; white-space: normal; }
.aa-empty, .empty-state { display: grid; gap: var(--aa-space-3); color: var(--aa-muted); }

.aa-grid { display: grid; gap: var(--aa-space-5); }
.aa-grid--2, .grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--aa-space-5); }
.aa-grid--3, .grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--aa-space-5); }
.aa-grid--4, .grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--aa-space-4); }
.aa-two-column { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .55fr); gap: var(--aa-space-6); align-items: start; }
.breadcrumb, .aa-breadcrumb { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; color: var(--aa-muted); font-size: 14px; }
.site-header, .aa-public-header { background: rgba(255, 255, 255, .94); }
.site-footer, .aa-footer { background: var(--aa-navy); }
.admin-sidebar { background: var(--aa-navy); }

@media (max-width: 980px) {
    .aa-grid--2, .aa-grid--3, .aa-grid--4, .aa-two-column { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    .aa-container, .container { width: min(100% - 24px, var(--aa-max)); }
    .aa-section { margin-top: var(--aa-space-7); }
    .aa-button, .button, button { width: auto; min-height: 46px; }
    th, td { white-space: normal; }
}