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

:root {
    --bg: #0f0c29;
    --accent: #7c3aed;
    --accent-light: #a78bfa;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --card: rgba(255,255,255,0.06);
    --border: rgba(255,255,255,0.12);
    --error: #f87171;
}

body {
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 2.5rem;
    width: 100%;
    max-width: 380px;
}

.logo {
    text-align: center;
    margin-bottom: 2rem;
}
.logo-icon {
    width: 52px; height: 52px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

h1 {
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.25rem;
}
.subtitle {
    font-size: 0.85rem;
    color: var(--muted);
    text-align: center;
    margin-bottom: 2rem;
}

label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
}

input[type="password"] {
    width: 100%;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.85rem 1rem;
    border-radius: 10px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
    margin-bottom: 1.25rem;
}
input[type="password"]:focus { border-color: var(--accent-light); }

.error-msg {
    background: rgba(248,113,113,0.1);
    border: 1px solid rgba(248,113,113,0.3);
    color: var(--error);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
}

button[type="submit"] {
    width: 100%;
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    color: white;
    border: none;
    padding: 0.9rem;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
}
button[type="submit"]:hover { opacity: 0.9; transform: translateY(-1px); }

.back-link {
    display: block;
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.85rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
}
.back-link:hover { color: var(--text); }