/* Authentication surface and shared credential-form primitives.
 * Profile and user-management password forms intentionally reuse the
 * login-field, login-input, login-button, and login-error treatments.
 */

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 32px 18px;
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--color-solar) 11%, transparent), transparent 42%),
        linear-gradient(225deg, color-mix(in srgb, var(--color-energy) 9%, transparent), transparent 46%),
        linear-gradient(180deg, var(--color-bg-alt), var(--color-bg-deep));
}

.login-shell::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(color-mix(in srgb, var(--color-line) 58%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, var(--color-line) 58%, transparent) 1px, transparent 1px);
    background-size: 52px 52px;
    opacity: 0.38;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.62), rgba(0, 0, 0, 0.08));
    -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.62), rgba(0, 0, 0, 0.08));
}

.login-panel {
    width: 100%;
    max-width: 430px;
    padding: 34px 32px 30px;
    background: color-mix(in srgb, var(--color-surface) 92%, transparent);
    border: 1px solid color-mix(in srgb, var(--color-line-strong) 74%, transparent);
    border-radius: 24px;
    box-shadow:
        0 24px 80px rgba(17, 24, 39, 0.16),
        var(--shadow-panel);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.login-brand {
    display: grid;
    justify-items: center;
    gap: 8px;
    text-align: center;
    margin-bottom: 28px;
}

.login-mark {
    width: 50px;
    height: 50px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    color: var(--color-solar);
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--color-solar) 16%, transparent), transparent),
        var(--color-bg-soft);
    border: 1px solid color-mix(in srgb, var(--color-solar) 22%, transparent);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.login-mark svg {
    width: 24px;
    height: 24px;
}

.login-kicker {
    margin-top: 8px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-solar);
}

.login-title {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0;
    line-height: 1.05;
}

.login-subtitle {
    max-width: 260px;
    font-size: 14px;
    line-height: 1.45;
    color: var(--color-text-muted);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

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

.login-input {
    background: color-mix(in srgb, var(--color-surface-strong) 88%, var(--color-bg-soft));
    border: 1px solid var(--color-line);
    border-radius: 12px;
    padding: 12px 14px;
    /* 16px is the iOS Safari threshold — anything smaller triggers auto-zoom
       on focus and leaves the whole app zoomed-in after navigation. */
    font-size: 16px;
    color: var(--color-text);
    outline: none;
    transition: border-color 0.15s;
}

.login-input:focus {
    border-color: var(--color-line-strong);
}

/* WCAG 2.4.7 / 2.4.11: keyboard-only users are the security boundary on the login
   page. The :focus border swap above (rgba 0.12 → 0.22) is barely perceptible on
   the dark theme — add an explicit focus ring on top so the focused field is
   unmistakable. Mirrors the global :focus-visible pattern. */
.login-input:focus-visible {
    outline: 0;
    border-color: var(--color-focus-outline);
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.login-remember {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 13px 14px;
    border: 1px solid color-mix(in srgb, var(--color-line) 82%, transparent);
    border-radius: 16px;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--color-energy) 5%, transparent), transparent),
        var(--color-bg-soft);
    color: var(--color-text);
    cursor: pointer;
}

.login-remember-input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--color-solar);
    flex-shrink: 0;
}

.login-remember-input:focus-visible {
    outline: 0;
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.login-remember-copy {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.login-remember-title {
    font-size: 0.9rem;
    font-weight: 700;
}

.login-remember-detail {
    color: var(--color-text-muted);
    font-size: 0.78rem;
    line-height: 1.35;
}

.login-button {
    margin-top: 8px;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--color-solar) 92%, #ffffff), var(--color-solar));
    border: 1px solid color-mix(in srgb, var(--color-solar) 70%, var(--color-line));
    border-radius: 14px;
    padding: 13px;
    text-align: center;
    font-weight: 700;
    font-size: 15px;
    color: var(--color-shell-900);
    cursor: pointer;
    box-shadow: 0 10px 30px color-mix(in srgb, var(--color-solar) 24%, transparent);
    transition: opacity 0.15s, transform 0.12s;
}

.login-button:active {
    transform: translateY(1px);
}

.login-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.login-button-copy {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
}

.login-button-icon {
    display: grid;
    place-items: center;
}

.login-button-icon svg {
    width: 18px;
    height: 18px;
}

.login-button-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid color-mix(in srgb, var(--color-shell-900) 18%, transparent);
    border-top-color: var(--color-shell-900);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.login-error {
    background: var(--color-error-soft);
    border: 1px solid var(--color-error-soft);
    border-radius: 14px;
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 14px;
    color: var(--color-error);
}

.login-expired {
    background: var(--color-water-soft);
    border: 1px solid var(--color-water-soft);
    border-radius: 14px;
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 14px;
    color: var(--color-water);
}

.login-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    margin-top: 28px;
    font-size: 12px;
    color: var(--color-text-muted);
}

.login-footer-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-energy);
    box-shadow: 0 0 8px color-mix(in srgb, var(--color-energy) 70%, transparent);
}

.login-hint {
    margin-top: 4px;
    font-size: 11px;
    color: var(--color-text-muted);
}