/* ═══════════════════════════════════════════════════════════════════════════
   Gradelytics — pages/auth.html
   ───────────────────────────────────────────────────────────────────────────
   Standalone sign-in / sign-up page. Reuses the design tokens from
   css/variables.css and the base button styles that css/style.css normally
   provides on the dashboard (auth.html does not load style.css).
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Reset & Base (mirrors css/style.css, which auth.html does not load) ── */

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

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.auth-body {
    min-height: 100vh;
    margin: 0;
    font-family: var(--font-body);
    line-height: 1.5;
    font-variant-numeric: tabular-nums;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background:
        radial-gradient(600px 400px at 85% -10%, rgba(var(--color-primary-rgb), 0.14), transparent 60%),
        radial-gradient(500px 360px at -10% 110%, rgba(var(--color-accent-rgb), 0.08), transparent 60%),
        var(--color-ink);
    color: var(--ink);
}

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--sp-5);
}

.auth-card {
    width: 100%;
    max-width: 360px;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--sp-6);
    box-shadow: var(--shadow-xl);
}

.auth-head {
    text-align: center;
    margin-bottom: var(--sp-4);
}

.auth-logo {
    height: 60px;
    margin-bottom: var(--sp-2);
}

.auth-head h2 {
    font-family: var(--font-heading);
    font-size: 19px;
    margin: 0 0 var(--sp-1);
    color: var(--ink);
}

.auth-head p {
    font-size: 13px;
    color: var(--text-light);
    margin: 0;
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-2);
    background: var(--surface);
    padding: var(--sp-1);
    border-radius: var(--radius-md);
    margin-bottom: var(--sp-4);
}

.auth-tab {
    border: none;
    background: transparent;
    color: var(--text-light);
    font: 600 13px/1 var(--font-body);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--duration-base), color var(--duration-base);
}

.auth-tab.active {
    background: var(--primary);
    color: #fff;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--sp-1);
}

.auth-field {
    display: flex;
    flex-direction: column;
    gap: var(--sp-1);
}

.auth-input-wrap {
    position: relative;
}

.auth-input-wrap i {
    position: absolute;
    top: 50%;
    left: 11px;
    transform: translateY(-50%);
    font-size: 16px;
    color: var(--muted);
    pointer-events: none;
}

.auth-field input {
    width: 100%;
    padding: 8px 11px 8px 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--ink);
    font: 400 14px/1.4 var(--font-body);
    outline: none;
    transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.auth-field input#auth-password {
    padding-right: 36px;
}

.auth-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.auth-input-wrap:focus-within i {
    color: var(--primary);
}

.password-toggle {
    position: absolute;
    top: 50%;
    right: 4px;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--muted);
    font-size: 16px;
    cursor: pointer;
    padding: 0;
}

.password-toggle:hover {
    color: var(--ink);
}

.password-toggle:active i {
    color: var(--primary);
}

.auth-error {
    min-height: 4px;
    margin: 0;
    font-size: 12.5px;
    color: var(--danger);
    text-align: center;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    margin: var(--sp-3) 0 var(--sp-2);
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-back-home {
    text-align: center;
    margin: var(--sp-4) 0 0;
    font-size: 13px;
}

.auth-back-home a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-light);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.auth-back-home a:hover {
    color: var(--primary);
}

/* ── Base buttons (from css/style.css, needed without loading it) ── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-heading);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
    white-space: nowrap;
    line-height: 1;
}

.btn-primary {
    background: linear-gradient(180deg, rgba(255,255,255,0.20) 0%, rgba(255,255,255,0) 50%, rgba(0,0,0,0.08) 100%), var(--primary);
    color: #fff;
    box-shadow: var(--shadow-blue), inset 0 1px 0 rgba(255,255,255,0.22);
}

.btn-primary:hover {
    background: linear-gradient(180deg, rgba(255,255,255,0.22) 0%, rgba(255,255,255,0) 50%, rgba(0,0,0,0.06) 100%), var(--primary-hover);
    box-shadow: var(--shadow-blue-lg), inset 0 1px 0 rgba(255,255,255,0.25);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm), inset 0 2px 4px rgba(0,0,0,0.12);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-full { width: 100%; }

.btn-google {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 8px 11px;
    background: var(--surface);
    color: var(--ink);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font: 600 13px/1 var(--font-body);
    cursor: pointer;
    transition: border-color var(--duration-fast), background var(--duration-fast);
}

.btn-google:hover {
    border-color: var(--primary);
    background: var(--primary-muted);
}

.btn-google svg {
    flex-shrink: 0;
}

/* ── Field label (from css/style.css) ── */

.field-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-light);
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}