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

:root {
    --bg: #060608;
    --surface: #0c0c10;
    --surface-2: #111116;
    --border: rgba(255,255,255,0.06);
    --border-hover: rgba(255,255,255,0.12);
    --accent: #8b5cf6;
    --accent-hover: #a78bfa;
    --accent-glow: rgba(139,92,246,0.15);
    --accent-subtle: rgba(139,92,246,0.08);
    --text: #e2e2e8;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --danger: #ef4444;
    --radius: 14px;
    --radius-sm: 10px;
    --font: 'Inter', sans-serif;
    --mono: 'JetBrains Mono', monospace;
}

html, body {
    width: 100%; height: 100%;
    overflow: hidden;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}

#bgCanvas {
    position: fixed; inset: 0;
    width: 100%; height: 100%;
    z-index: 0; pointer-events: none;
}

.auth-container {
    position: relative; z-index: 1;
    width: 100%; height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    width: 400px; max-width: 92vw;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 32px;
    position: relative;
    overflow: hidden;
    animation: cardIn 0.6s cubic-bezier(0.23,1,0.32,1) forwards;
    box-shadow: 0 20px 80px rgba(0,0,0,0.5), 0 0 60px var(--accent-glow);
}

.auth-card::before {
    content: '';
    position: absolute; inset: 0;
    border-radius: var(--radius);
    padding: 1px;
    background: linear-gradient(160deg, rgba(139,92,246,0.2) 0%, transparent 40%, transparent 60%, rgba(139,92,246,0.1) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(24px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.auth-header {
    text-align: center;
    margin-bottom: 28px;
}

.auth-logo {
    width: 52px; height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; color: #fff;
    margin: 0 auto 16px;
    box-shadow: 0 6px 25px var(--accent-glow);
}

.auth-header h1 {
    font-size: 22px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 4px;
}

.auth-header p {
    font-size: 13px; color: var(--text-muted);
}

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

.form-group {
    display: flex; flex-direction: column; gap: 6px;
}

.form-label {
    font-size: 11px; font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex; align-items: center; gap: 6px;
}

.form-label i {
    color: var(--accent); font-size: 11px;
}

.form-input {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    font-family: var(--font);
    transition: all 0.2s ease;
    outline: none;
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder { color: var(--text-muted); }

.form-hint {
    font-size: 10px; color: var(--text-muted);
}

.password-wrap {
    position: relative;
}

.password-wrap .form-input {
    padding-right: 40px;
}

.password-toggle {
    position: absolute;
    right: 10px; top: 50%; transform: translateY(-50%);
    background: none; border: none;
    color: var(--text-muted); cursor: pointer;
    font-size: 13px;
    transition: color 0.2s ease;
}

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

.form-error {
    font-size: 12px; color: var(--danger);
    min-height: 16px;
    text-align: center;
}

.auth-btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 10px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.auth-btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 30px var(--accent-glow);
    transform: translateY(-1px);
}

.auth-btn:active {
    transform: translateY(0);
}

.auth-btn.loading .auth-btn-text { opacity: 0; }
.auth-btn.loading i { animation: spin 0.8s linear infinite; }
.auth-btn.loading::after {
    content: '';
    position: absolute;
    width: 18px; height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-6px); }
    80% { transform: translateX(6px); }
}

.auth-card.shake {
    animation: shake 0.45s cubic-bezier(.36,.07,.19,.97) both;
}

.demo-hint {
    margin-top: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--accent-subtle);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 999px;
}

.demo-hint code {
    font-family: var(--mono);
    color: var(--accent-hover);
    font-size: 11px;
}

.cursor-glow {
    position: fixed;
    top: 0; left: 0;
    width: 440px; height: 440px;
    border-radius: 50%;
    pointer-events: none;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.22) 0%, rgba(139, 92, 246, 0.10) 30%, transparent 65%);
    mix-blend-mode: screen;
    z-index: 2;
    will-change: transform;
    filter: blur(14px);
}

.form-input, .auth-btn, .password-toggle, .auth-footer a {
    transition: background-color .25s ease, border-color .25s ease, color .25s ease, box-shadow .3s ease, transform .25s ease;
}

.form-input:hover:not(:focus) {
    border-color: var(--border-hover);
}

.auth-btn:hover {
    transform: translateY(-2px);
}

.form-group {
    opacity: 0;
    transform: translateY(8px);
    animation: groupIn 0.5s cubic-bezier(.23,1,.32,1) forwards;
}
.form-group:nth-of-type(1) { animation-delay: .15s; }
.form-group:nth-of-type(2) { animation-delay: .25s; }
.auth-btn { opacity: 0; transform: translateY(8px); animation: groupIn 0.5s cubic-bezier(.23,1,.32,1) .4s forwards; }

@keyframes groupIn {
    to { opacity: 1; transform: translateY(0); }
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    margin-left: 4px;
    transition: color 0.2s ease;
}

.auth-footer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.auth-decoration {
    display: none;
}