@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

/* ── Design tokens ───────────────────────────────────────── */
:root {
    --bg:           #0d0d0d;
    --surface:      #161616;
    --surface-2:    #1f1f1f;
    --border:       #2a2a2a;
    --border-focus: #4a4a4a;
    --text:         #f0f0f0;
    --text-2:       #8a8a8a;
    --text-3:       #555;
    --amber:        #f59e0b;
    --amber-dim:    rgba(245,158,11,0.12);
    --amber-glow:   rgba(245,158,11,0.25);
    --green:        #22c55e;
    --green-dim:    rgba(34,197,94,0.12);
    --red:          #ef4444;
    --red-dim:      rgba(239,68,68,0.1);
    --white:        #ffffff;
    --radius:       14px;
    --radius-sm:    8px;
    --font:         'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box; margin: 0; padding: 0;
    -webkit-tap-highlight-color: transparent;
}

/* ── Base ────────────────────────────────────────────────── */
html {
    height: 100%;
    background: var(--bg);
}

body {
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.5;
}

/* ── Views ───────────────────────────────────────────────── */
.view-centred {
    display: none;
    min-height: 100vh;
    justify-content: center;
    align-items: center;
    padding: 24px 20px;
}
.view-centred.active { display: flex; }

.view-scroll {
    display: none;
    min-height: 100vh;
    padding: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.view-scroll.active { display: block; }

/* ── Card ────────────────────────────────────────────────── */
.card {
    width: 100%;
    max-width: 400px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
}

.card-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 28px;
}
.card-logo-icon {
    width: 36px; height: 36px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
}
.card-logo-icon svg { color: var(--amber); }
.card-logo-name {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-2);
    margin-bottom: 28px;
}

/* ── Form elements ───────────────────────────────────────── */
.field { margin-bottom: 16px; }
.field label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-2);
    margin-bottom: 6px;
    letter-spacing: 0.02em;
}
.field input {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.9375rem;
    padding: 12px 14px;
    outline: none;
    transition: border-color 0.15s;
    -webkit-appearance: none;
}
.field input:focus { border-color: var(--border-focus); }
.field input::placeholder { color: var(--text-3); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 13px 20px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: opacity 0.15s, background 0.15s, transform 0.1s;
    -webkit-appearance: none;
    text-decoration: none;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.btn-primary {
    background: var(--white);
    color: #000;
    margin-top: 8px;
}
.btn-primary:hover:not(:disabled) { opacity: 0.9; }

.btn-ghost {
    background: transparent;
    color: var(--text-2);
    border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) { border-color: var(--border-focus); color: var(--text); }

.btn-amber {
    background: var(--amber);
    color: #000;
    font-weight: 600;
}
.btn-amber:hover:not(:disabled) { opacity: 0.9; }

.btn-amber-outline {
    background: transparent;
    color: var(--amber);
    border: 1px solid var(--amber);
}
.btn-amber-outline:hover:not(:disabled) { background: var(--amber-dim); }
.btn-amber-outline.copied {
    color: var(--green);
    border-color: var(--green);
    background: var(--green-dim);
}

.btn-green {
    background: var(--green);
    color: #000;
    font-weight: 600;
}
.btn-green:disabled {
    background: var(--surface-2);
    color: var(--text-3);
    border: 1px solid var(--border);
    opacity: 1;
    cursor: not-allowed;
}
.btn-green:not(:disabled):hover { opacity: 0.9; }

.btn-red-outline {
    background: transparent;
    color: var(--red);
    border: 1px solid var(--red);
}
.btn-red-outline:hover { background: var(--red-dim); }

/* ── Auth footer links ───────────────────────────────────── */
.auth-footer {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
}
.link-btn {
    background: none; border: none;
    color: var(--text-2); font-family: var(--font);
    font-size: 0.8125rem; cursor: pointer;
    text-decoration: underline; text-underline-offset: 2px;
    padding: 4px 0;
}
.link-btn:hover { color: var(--text); }

/* ── Status ──────────────────────────────────────────────── */
.status {
    margin-top: 14px;
    font-size: 0.8125rem;
    text-align: center;
    min-height: 1.2rem;
    word-break: break-word;
}
.status.error   { color: var(--red); }
.status.success { color: var(--green); }

/* ── User badge (quick unlock) ───────────────────────────── */
.user-badge {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    margin-bottom: 20px;
    font-size: 0.8125rem;
    color: var(--text-2);
}
.user-badge strong {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text);
    margin-top: 2px;
}

/* ── Key Guardian ────────────────────────────────────────── */
.kg-page {
    max-width: 420px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}

.kg-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--amber-dim);
    border: 1px solid var(--amber-glow);
    border-radius: 100px;
    padding: 5px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--amber);
    letter-spacing: 0.04em;
    margin-bottom: 20px;
}
.kg-badge-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--amber);
}

.kg-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.35;
    margin-bottom: 8px;
}
.kg-subtitle {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.6;
    margin-bottom: 28px;
}

.kg-warning-card {
    background: var(--amber-dim);
    border: 1px solid var(--amber-glow);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 24px;
}
.kg-warning-card p {
    font-size: 0.875rem;
    color: var(--text);
    line-height: 1.65;
}
.kg-warning-card p + p { margin-top: 10px; }
.kg-warning-card strong { color: var(--amber); font-weight: 600; }

.kg-key-section { margin-bottom: 24px; }
.kg-key-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-2);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.kg-key-box {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: 'Courier New', 'Courier', monospace;
    font-size: 1rem;
    color: var(--white);
    letter-spacing: 0.04em;
    line-height: 1.6;
    word-break: break-all;
    user-select: all;
    cursor: text;
    margin-bottom: 10px;
}

.kg-checks {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}
.kg-check {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    cursor: pointer;
    transition: border-color 0.15s;
    -webkit-user-select: none;
    user-select: none;
}
.kg-check.checked {
    border-color: var(--green);
    background: var(--green-dim);
}
.kg-check input[type="checkbox"] { display: none; }
.kg-check-box {
    width: 20px; min-width: 20px; height: 20px;
    border: 2px solid var(--border);
    border-radius: 5px;
    margin-top: 1px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s, border-color 0.15s;
}
.kg-check.checked .kg-check-box {
    background: var(--green);
    border-color: var(--green);
}
.kg-check-box svg { display: none; }
.kg-check.checked .kg-check-box svg { display: block; }
.kg-check-text {
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.5;
}
.kg-check.checked .kg-check-text { color: var(--text); }

/* ── Second-chance bottom sheet ──────────────────────────── */
.sc-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    z-index: 200;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.sc-overlay.visible { display: flex; }
.sc-sheet {
    width: 100%;
    max-width: 480px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-radius: 20px 20px 0 0;
    padding: 28px 24px 40px;
}
.sc-handle {
    width: 36px; height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin: 0 auto 20px;
}
.sc-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
}
.sc-body {
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.65;
    margin-bottom: 24px;
}
.sc-body strong { color: var(--text); font-weight: 500; }
.sc-actions { display: flex; flex-direction: column; gap: 10px; }

/* ── Animations ──────────────────────────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}
.view-centred.active .card,
.view-scroll.active .kg-page {
    animation: fadeUp 0.25s ease;
}