:root {
    --bg: #0b0d17;
    --bg-2: #11142a;
    --surface: #161a35;
    --surface-2: #1d2247;
    --border: #2a2f5a;
    --text: #e7e9ff;
    --text-dim: #9ea3c9;
    --primary: #6366f1;
    --accent: #ec4899;
    --gradient: linear-gradient(135deg, #6366f1, #ec4899);
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    --transition: 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: radial-gradient(circle at top, var(--bg-2) 0%, var(--bg) 60%);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

.signin-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-form {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.auth-form h1 {
    font-size: 24px;
    font-weight: 700;
}

.form-sub {
    color: var(--text-dim);
    font-size: 14px;
    margin-top: -8px;
}

.form-demo-note {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    font-size: 13px;
    padding: 10px 12px;
}

.auth-form label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 13px;
    color: var(--text-dim);
}

.auth-form input {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 10px 12px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color var(--transition);
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary);
}

.forgot {
    align-self: flex-end;
    font-size: 13px;
    color: var(--text-dim);
    transition: color var(--transition);
}

.forgot:hover { color: var(--primary); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: 1px solid transparent;
    font-family: inherit;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.55);
}

.btn-block { width: 100%; }

.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 12px 20px;
    font-size: 14px;
    box-shadow: var(--shadow);
    opacity: 0;
    transition: opacity var(--transition), transform var(--transition);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}