/* SentinelAI Identity — Dark Theme */
/* Tokens from DESIGN-TOKENS.md */

:root {
    --slate-950: #020617;
    --slate-900: #0f172a;
    --slate-850: #172033;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-100: #f1f5f9;

    --cyan-accent: #5BB1F7;
    --cyan-accent-alt: #29B6F6;
    --blue-primary: #1565C0;
    --blue-bright: #2196F3;
    --gradient-start: #2C64D9;

    --error-main: #DC2626;
    --error-light: #F87171;
    --success-main: #059669;
}

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

body {
    font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--slate-950) 0%, var(--slate-900) 50%, var(--slate-850) 100%);
    color: var(--slate-100);
    min-height: 100vh;
}

.page-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.card {
    background: linear-gradient(135deg, var(--slate-800), rgba(30, 41, 59, 0.85));
    border: 1px solid rgba(100, 116, 139, 0.45);
    border-radius: 12px;
    padding: 2rem;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3), 0 1px 4px -1px rgba(0, 0, 0, 0.2);
}

.header-area {
    text-align: center;
    margin-bottom: 1.5rem;
}

.logo-icon {
    margin-bottom: 0.75rem;
}

.logo-text {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--slate-100);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--slate-400);
    line-height: 1.5;
}

.header-divider {
    border: none;
    border-top: 1px solid var(--slate-700);
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--slate-100);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-300);
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, rgba(20, 28, 42, 0.95), rgba(18, 25, 38, 0.85));
    border: 1px solid var(--slate-600);
    border-radius: 8px;
    color: var(--slate-100);
    font-size: 0.9375rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:hover {
    border-color: var(--slate-400);
}

.form-group input:focus {
    outline: none;
    border-color: var(--cyan-accent);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.2);
}

.form-group input::placeholder {
    color: var(--slate-600);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.checkbox-group input[type="checkbox"] {
    accent-color: var(--cyan-accent);
    width: 1rem;
    height: 1rem;
}

.checkbox-group label {
    font-size: 0.875rem;
    color: var(--slate-400);
    cursor: pointer;
}

.btn-primary {
    display: block;
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--blue-primary));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--blue-bright), var(--blue-primary));
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary.loading {
    position: relative;
    color: transparent;
}

.btn-primary.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.validation-summary {
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid var(--error-main);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
    color: var(--error-light);
    font-size: 0.875rem;
}

.validation-summary ul {
    list-style: none;
    padding: 0;
}

.field-validation-error {
    color: var(--error-light);
    font-size: 0.8125rem;
    margin-top: 0.25rem;
}

.success-message {
    background: rgba(5, 150, 105, 0.1);
    border: 1px solid var(--success-main);
    border-radius: 8px;
    padding: 1.5rem 1rem;
    color: var(--success-main);
    font-size: 1rem;
    text-align: center;
    line-height: 1.6;
}

.success-message .success-icon {
    display: block;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.success-message .success-heading {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--slate-100);
    margin-bottom: 0.25rem;
}

.info-text {
    font-size: 0.875rem;
    color: var(--slate-400);
    text-align: center;
    margin-top: 1rem;
}

a {
    color: var(--cyan-accent-alt);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--cyan-accent);
    text-decoration: underline;
}

.divider {
    border: none;
    border-top: 1px solid var(--slate-700);
    margin: 1.5rem 0;
}

.create-account {
    text-align: center;
    font-size: 0.875rem;
    color: var(--slate-400);
}

.logout-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--slate-700);
    border-top-color: var(--cyan-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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