/* Login layout. Color and type come from design-system.css. */

:root,
[data-theme="dark"] {
    --login-card-bg: color-mix(in srgb, var(--bg-card) 98%, transparent);
    --login-card-border: color-mix(in srgb, var(--accent-primary) 18%, transparent);
    --login-field-bg: color-mix(in srgb, var(--bg-primary) 78%, transparent);
    --login-field-border: color-mix(in srgb, var(--border-primary) 90%, transparent);
    --login-glow-a: color-mix(in srgb, var(--accent-primary) 14%, transparent);
    --login-glow-b: var(--bg-atmosphere-3);
    --login-orb-glow: color-mix(in srgb, var(--accent-primary) 32%, transparent);
    --login-card-shadow: 0 18px 50px var(--shadow-backdrop), 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
    --login-focus-ring: color-mix(in srgb, var(--accent-primary) 14%, transparent);
    --login-focus-border: color-mix(in srgb, var(--accent-primary) 70%, transparent);
    --login-btn-from: var(--accent-secondary);
    --login-btn-to: #00b8d9;
    --login-btn-text: var(--text-inverse);
    --login-btn-shadow: color-mix(in srgb, var(--accent-primary) 28%, transparent);
    --login-spinner-track: rgba(255, 255, 255, 0.15);
}

[data-theme="light"] {
    --login-card-bg: color-mix(in srgb, var(--bg-card) 96%, transparent);
    --login-card-border: color-mix(in srgb, var(--accent-primary) 18%, transparent);
    --login-field-bg: color-mix(in srgb, var(--bg-secondary) 90%, transparent);
    --login-field-border: color-mix(in srgb, var(--border-primary) 70%, transparent);
    --login-glow-a: color-mix(in srgb, var(--accent-primary) 10%, transparent);
    --login-glow-b: var(--bg-atmosphere-3);
    --login-orb-glow: color-mix(in srgb, var(--accent-primary) 22%, transparent);
    --login-card-shadow: 0 18px 40px color-mix(in srgb, var(--shadow-backdrop) 18%, transparent), 0 0 0 1px rgba(255, 255, 255, 0.65) inset;
    --login-focus-ring: color-mix(in srgb, var(--accent-primary) 14%, transparent);
    --login-focus-border: color-mix(in srgb, var(--accent-primary) 65%, transparent);
    --login-btn-from: var(--accent-secondary);
    --login-btn-to: var(--accent-primary);
    --login-btn-text: var(--text-inverse);
    --login-btn-shadow: color-mix(in srgb, var(--accent-primary) 22%, transparent);
    --login-spinner-track: color-mix(in srgb, var(--text-inverse) 12%, transparent);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    font-family: var(--font-ui);
    color: var(--text-primary);
    background:
        radial-gradient(900px 520px at 50% 42%, var(--login-glow-a) 0%, transparent 58%),
        radial-gradient(1400px 800px at 50% 110%, var(--login-glow-b) 0%, transparent 55%),
        var(--bg-primary);
    padding: 1.25rem;
}

.login-shell {
    position: relative;
    width: min(100%, 300px);
}

.login-shell::before {
    content: "";
    position: absolute;
    inset: -28% -34%;
    border-radius: 50%;
    background: radial-gradient(circle at 50% 45%, var(--login-orb-glow) 0%, transparent 68%);
    filter: blur(28px);
    opacity: 0.95;
    pointer-events: none;
    z-index: 0;
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    padding: 1.7rem 1.45rem 1.5rem;
    border-radius: 16px;
    background: var(--login-card-bg);
    border: 1px solid var(--login-card-border);
    box-shadow: var(--login-card-shadow);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    text-align: center;
}

.brand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    margin-bottom: 1.35rem;
}

.brand-orb {
    display: block;
    width: 22px;
    height: 22px;
    flex: 0 0 auto;
}

.brand-mark {
    font-family: var(--font-brand);
    font-size: var(--text-lg);
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--text-primary);
    text-shadow: var(--brand-glow);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.input-group { text-align: left; }

.input-group label {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--text-secondary);
    font-size: var(--text-xs);
    font-weight: 650;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.input-group input {
    width: 100%;
    padding: 0.72rem 0.85rem;
    border: 1px solid var(--login-field-border);
    border-radius: 8px;
    background: var(--login-field-bg);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: var(--text-base);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--login-focus-border);
    box-shadow: 0 0 0 3px var(--login-focus-ring);
}

.login-btn {
    margin-top: 0.35rem;
    padding: 0.78rem 1rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(180deg, var(--login-btn-from) 0%, var(--login-btn-to) 100%);
    color: var(--login-btn-text);
    font-family: var(--font-ui);
    font-size: var(--text-prose);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.login-btn:hover {
    filter: brightness(1.05);
    box-shadow: 0 8px 22px var(--login-btn-shadow);
    transform: translateY(-1px);
}

.login-btn:active { transform: translateY(0); }
.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.error-message {
    color: var(--error-text);
    font-size: var(--text-prose);
    margin-top: 0.35rem;
    min-height: 1.1em;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.error-message.show { opacity: 1; }

.loading {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    color: var(--text-secondary);
    font-size: var(--text-prose);
    margin-top: 0.35rem;
}
.loading.show { display: flex; }

@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--login-spinner-track);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

.access-transition {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: grid;
    place-items: center;
    background:
        radial-gradient(700px 420px at 50% 46%, var(--login-glow-a) 0%, transparent 62%),
        var(--bg-primary);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 150ms ease, visibility 150ms ease;
}

.access-transition.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.access-transition__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.access-transition__orb {
    display: block;
    margin-bottom: 0.72rem;
}

.access-transition__inner strong {
    font-family: var(--font-brand);
    font-size: var(--text-xs);
    font-weight: 720;
    letter-spacing: 0.28em;
    color: var(--text-primary);
}

.access-transition__inner p {
    margin: 0.42rem 0 0;
    color: var(--text-secondary);
    font-size: var(--text-2xs);
    letter-spacing: 0.04em;
}

@media (prefers-reduced-motion: reduce) {
    .access-transition { transition: none; }
}