/* ============================================================
   ArchScapeAI — Auth Pages (Login / Signup)
   Dark Glass Design | Inter font
   ============================================================ */

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

:root {
    /* Color palette */
    --bg-dark:        #0a0e1a;
    --bg-card:        rgba(255, 255, 255, 0.04);
    --border-glass:   rgba(255, 255, 255, 0.08);
    --border-focus:   rgba(0, 212, 255, 0.6);
    --text-primary:   #f0f4ff;
    --text-secondary: #8892a4;
    --text-muted:     #4a5568;
    --accent:         #00d4ff;
    --accent-dark:    #0099bb;
    --accent-glow:    rgba(0, 212, 255, 0.2);
    --error:          #ff4757;
    --error-bg:       rgba(255, 71, 87, 0.1);
    --success:        #2ecc71;

    /* Spacing */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2rem;
    --space-2xl: 3rem;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Transition */
    --transition: 0.2s ease;
}

/* ─── Body ──────────────────────────────────────────────────── */
.auth-body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ─── Animated background orbs ─────────────────────────────── */
.auth-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.auth-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: orbFloat 8s ease-in-out infinite alternate;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #0066ff 0%, transparent 70%);
    top: -150px;
    left: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #00d4ff 0%, transparent 70%);
    bottom: -100px;
    right: -80px;
    animation-delay: -3s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #7c3aed 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -6s;
}

@keyframes orbFloat {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, -30px) scale(1.08); }
}

/* ─── Container ──────────────────────────────────────────────── */
.auth-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: var(--space-md);
}

/* ─── Glass Card ─────────────────────────────────────────────── */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.4),
        0 1px 0 rgba(255, 255, 255, 0.06) inset;
}

/* ─── Brand / Logo ───────────────────────────────────────────── */
.auth-brand {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.auth-logo {
    width: 64px;
    height: 64px;
    object-fit: contain;
    margin-bottom: var(--space-sm);
    filter: drop-shadow(0 0 16px var(--accent-glow));
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.auth-title .accent {
    color: var(--accent);
    background: linear-gradient(135deg, var(--accent), #0099ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--space-xs);
}

/* ─── Alert ──────────────────────────────────────────────────── */
.auth-alert {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    animation: slideIn 0.2s ease;
}

.auth-alert-error {
    background: var(--error-bg);
    border: 1px solid rgba(255, 71, 87, 0.3);
    color: #ff6b7a;
}

.alert-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── Form ───────────────────────────────────────────────────── */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.form-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.form-icon {
    position: absolute;
    left: var(--space-md);
    font-size: 1rem;
    pointer-events: none;
    opacity: 0.6;
}

.form-input {
    width: 100%;
    padding: 0.75rem var(--space-md) 0.75rem 2.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-family: inherit;
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
    outline: none;
}

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

.form-input:focus {
    border-color: var(--border-focus);
    background: rgba(0, 212, 255, 0.04);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input.input-error {
    border-color: var(--error);
    background: var(--error-bg);
}

.form-error {
    font-size: 0.75rem;
    color: var(--error);
    min-height: 1rem;
}

.toggle-password {
    position: absolute;
    right: var(--space-md);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    opacity: 0.5;
    transition: opacity var(--transition);
    padding: 0;
}

.toggle-password:hover { opacity: 1; }

.password-strength {
    font-size: 0.75rem;
    font-weight: 500;
    min-height: 1rem;
    transition: color var(--transition);
}

/* ─── Buttons ────────────────────────────────────────────────── */
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem var(--space-lg);
    background: linear-gradient(135deg, var(--accent), #0066ff);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-full { width: 100%; }

.btn-primary:hover:not(:disabled) {
    opacity: 0.92;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0, 212, 255, 0.45);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-spinner {
    display: inline-block;
    animation: spin 0.8s linear infinite;
    font-style: normal;
}

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

/* ─── Divider ────────────────────────────────────────────────── */
.auth-divider {
    position: relative;
    text-align: center;
    margin: var(--space-md) 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--border-glass);
}

.auth-divider::before { left: 0; }
.auth-divider::after  { right: 0; }

.auth-divider span {
    background: var(--bg-dark);
    padding: 0 var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
}

/* ─── Switch link ─────────────────────────────────────────────── */
.auth-switch {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.auth-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: opacity var(--transition);
}

.auth-link:hover { opacity: 0.8; text-decoration: underline; }

/* ─── Utility ─────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ─── Responsive ──────────────────────────────────────────────── */
@media (max-width: 480px) {
    .glass-card {
        padding: var(--space-xl) var(--space-lg);
        border-radius: var(--radius-lg);
    }

    .auth-container {
        padding: var(--space-sm);
    }
}