/* ============================================================
   CORTEX — Login Page
   Neural network / brain cortex themed login experience.
   Depends on: app.css (design system variables)
   ============================================================ */

/* ── Neural Canvas ── */
#neural-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
}

/* ── Atmospheric overlays ── */
.atmosphere {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        radial-gradient(ellipse 80% 60% at 50% 50%, transparent 30%, var(--bg-primary) 100%),
        radial-gradient(ellipse 40% 40% at 30% 40%, var(--accent-a03) 0%, transparent 70%),
        radial-gradient(ellipse 35% 35% at 70% 60%, rgba(212,175,55,0.02) 0%, transparent 70%);
}

.vignette {
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    box-shadow: inset 0 0 200px 60px rgba(0,0,0,0.7);
}

/* ── Login Container ── */
.login-container {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

/* ── Login Card (Glassmorphism) ── */
.login-card {
    position: relative;
    width: 420px;
    max-width: 100%;
    padding: 48px 44px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--accent-a08);
    border-radius: 20px;
    box-shadow:
        var(--shadow-xl),
        0 0 1px var(--accent-a15),
        inset 0 1px 0 var(--glass-highlight),
        inset 0 -1px 0 rgba(0,0,0,0.2);
    opacity: 0;
    transform: translateY(30px) scale(0.97);
    animation: cardReveal 1s var(--ease-out-expo) 0.4s forwards;
}

.login-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 21px;
    padding: 1px;
    background: linear-gradient(
        170deg,
        var(--accent-a15) 0%,
        var(--accent-a03) 30%,
        transparent 60%,
        var(--accent-a05) 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 cardReveal {
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Cortex Branding ── */
.login-brand {
    text-align: center;
    margin-bottom: 40px;
    opacity: 0;
    animation: brandReveal 0.8s var(--ease-out-expo) 0.7s forwards;
}

@keyframes brandReveal {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-logo {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 12px;
    text-transform: uppercase;
    color: var(--accent);
    text-shadow:
        0 0 30px var(--accent-a30),
        0 0 60px var(--accent-a10);
    margin-bottom: 6px;
    position: relative;
    display: inline-block;
}

.login-logo::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-a30), transparent);
}

.login-subtitle {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 14px;
}

/* ── Neural indicator dots ── */
.neural-dots {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 16px;
}

.neural-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.3;
    animation: dotPulse 3s ease-in-out infinite;
}
.neural-dot:nth-child(2) { animation-delay: 0.4s; }
.neural-dot:nth-child(3) { animation-delay: 0.8s; }
.neural-dot:nth-child(4) { animation-delay: 1.2s; }
.neural-dot:nth-child(5) { animation-delay: 1.6s; }

@keyframes dotPulse {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.5); }
}

/* ── Form ── */
.login-form {
    opacity: 0;
    animation: formReveal 0.8s var(--ease-out-expo) 0.9s forwards;
}

@keyframes formReveal {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-card .form-group {
    margin-bottom: 22px;
    position: relative;
}

.login-card .form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    margin-bottom: 8px;
    transition: color 0.3s;
}

.login-card .form-group:focus-within label {
    color: var(--accent);
}

.login-card .form-group input[type="email"],
.login-card .form-group input[type="password"] {
    width: 100%;
    padding: 14px 18px;
    background: var(--glass-input-bg);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 14px;
    transition: all 0.3s var(--ease-standard);
    outline: none;
}

.login-card .form-group input:hover {
    border-color: var(--border-secondary);
}

.login-card .form-group input:focus {
    border-color: var(--accent-a40);
    background: var(--glass-input-bg-focus);
    box-shadow:
        0 0 0 3px var(--accent-glow),
        0 0 20px rgba(212,175,55,0.04);
}

.login-card .form-group input::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

/* ── Submit Button ── */
.login-btn {
    width: 100%;
    padding: 15px;
    margin-top: 6px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s var(--ease-standard);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, var(--glass-shine) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.5s;
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
    transform: translateY(-2px);
    box-shadow:
        var(--shadow-accent-md),
        var(--shadow-accent-lg);
}

.login-btn:hover::before {
    transform: translateX(100%);
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-accent-sm);
}

/* ── Error ── */
.login-error {
    padding: 12px 16px;
    background: var(--danger-bg);
    border: 1px solid var(--danger-border-light);
    border-radius: var(--radius-lg);
    color: var(--danger);
    font-size: 13px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
    animation: errorShake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* ── Footer ── */
.login-footer {
    text-align: center;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid rgba(42, 44, 51, 0.5);
    opacity: 0;
    animation: formReveal 0.8s var(--ease-out-expo) 1.1s forwards;
}

.login-footer-text {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

/* ── Selection ── */
::selection {
    background: var(--accent-a25);
    color: var(--text-primary);
}

/* ── Responsive ── */
@media (max-width: 480px) {
    .login-card {
        padding: 36px 28px;
        border-radius: var(--radius-xl);
    }
    .login-logo {
        font-size: 22px;
        letter-spacing: 8px;
    }
}