/* ==========================================================================
   Login Page Styles — Phase 10 Redesign
   Full-screen Canvas Matrix background with frosted glass login card
   ========================================================================== */

/* ---- Page Layout (full viewport, center card) ---- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

/* ---- Static Gradient Fallback ---- */
/* Always present behind canvas. Visible when canvas is disabled/unsupported. */
.matrix-bg-fallback {
    position: fixed;
    inset: 0;
    z-index: 0;
    background: radial-gradient(
        ellipse at 50% 50%,
        #0f172a 0%,
        #0a0f1a 50%,
        #060a12 100%
    );
}

/* ---- Canvas Element ---- */
.matrix-bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* ---- Login Card (glass overlay) ---- */
.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-2xl);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}
/* NOTE: .glass class from components.css handles the frosted glass effect.
   The .login-card gets base fallback from .glass (opaque elevated bg),
   and the @supports block provides backdrop-filter blur with semi-transparent bg. */

/* ---- Login Header (logo + title + tagline) ---- */
.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    /* Soft glow effect on the shield icon */
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}

.login-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin: 0 0 var(--spacing-xs) 0;
}

.login-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
    letter-spacing: 0.02em;
}

/* ---- Alert Container (prevents card shift on error) ---- */
/* min-height reserves space for one alert line so the card height stays
   stable whether or not an error is showing — per user decision:
   "Card doesn't shift on error". */
.login-alerts {
    min-height: 52px;
    margin-bottom: var(--spacing-md);
}

.login-card .alert {
    margin-bottom: var(--spacing-sm);
}

.login-card .alert:last-child {
    margin-bottom: 0;
}

/* ---- Form Inputs (dark background for dark-on-dark context) ---- */
.login-form .form-input {
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: 12px 14px;
    color: var(--color-text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-form .form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
    outline: none;
}

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

.login-form .form-input-group .form-input {
    padding-right: 48px;
}

/* Password toggle button */
.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s;
}

.password-toggle:hover {
    color: var(--color-text-primary);
}

/* Remember me */
.remember-me {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.remember-me input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent);
    cursor: pointer;
}

.remember-me label {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    cursor: pointer;
}

/* Submit button */
.login-submit {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: var(--font-size-base);
}

/* Rate limit message */
.rate-limit-message {
    color: var(--color-error);
    text-align: center;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-md);
}

/* ---- Responsive ---- */
/* Below 768px: no canvas animation, full-width card */
@media (max-width: 767px) {
    .matrix-bg-canvas {
        display: none;
    }

    .login-card {
        max-width: 100%;
        border-radius: 8px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: var(--spacing-xl);
    }

    .login-logo {
        font-size: 2rem;
    }
}