/* ========================================
   Login Page - Sci-fi Glassmorphism Theme
   Uses design-tokens.css variables
   ======================================== */

/* ---- Full-viewport layout ---- */
html {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    width: 100%;
    height: 100%;
    overflow: auto;
    position: relative;
    min-height: 500px;
    color: var(--text-primary);
}

/* ---- Particles background ---- */
#particles-js {
    width: 100%;
    height: 100%;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 0;
    background: var(--bg-gradient);
}

#particles-js canvas {
    width: 100% !important;
    height: 100% !important;
}

/* ---- Main container ---- */
#bigBox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

/* ---- Login card (glassmorphism) ---- */
.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-2xl) var(--spacing-xl);
    animation: fadeIn 0.6s ease forwards;
    position: relative;
    overflow: hidden;
}

/* Decorative top glow line */
.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--color-primary-light) 50%,
        transparent 100%
    );
    opacity: 0.6;
}

/* ---- Title ---- */
.login-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: clamp(1.25rem, 4vw, 1.5rem);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.login-title-sub {
    display: block;
    margin-top: var(--spacing-md);
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--text-muted);
    letter-spacing: 0;
    line-height: 1.8;
    text-align: left;
    white-space: normal;
    padding: var(--spacing-md);
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-md);
}

/* ---- Form ---- */
.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* ---- Input group ---- */
.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group .input-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    opacity: 0.5;
    transition: opacity var(--transition-base);
    pointer-events: none;
    z-index: 2;
    color: var(--text-secondary);
}

.input-group.focus .input-icon {
    opacity: 1;
}

.input-group input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 48px;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-base);
    min-height: 48px;
}

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

.input-group input:focus {
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--glow-sm), inset 0 0 20px rgba(59, 130, 246, 0.05);
}

/* Focus glow ring */
.input-group.focus::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    opacity: 0.15;
    z-index: 0;
    pointer-events: none;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    -webkit-mask-composite: xor;
    padding: 1px;
}

/* ---- Error message ---- */
.error-message {
    text-align: center;
    color: var(--color-error);
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    margin: 0;
    animation: fadeIn 0.3s ease;
}

/* ---- Submit area ---- */
.submit-box {
    margin-top: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ---- Login button ---- */
.login-btn {
    display: block;
    width: 100%;
    min-height: 48px;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    font-family: var(--font-family);
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--glow-sm);
    text-align: center;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-md), 0 8px 25px rgba(59, 130, 246, 0.3);
}

.login-btn:hover::before {
    opacity: 1;
}

.login-btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: var(--glow-sm);
}

/* Inactive state */
.login-btn.inactive {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    box-shadow: none;
    cursor: not-allowed;
    color: var(--text-muted);
}

.login-btn.inactive:hover {
    transform: none;
    box-shadow: none;
}

/* Hidden real submit button */
#real_submit {
    display: none;
}

/* ---- Bottom background image ---- */
#bottom_bg {
    width: 100%;
    height: 4rem;
    position: absolute;
    bottom: 0;
    margin-top: -1.5rem;
    z-index: 0;
    opacity: 0.3;
    pointer-events: none;
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
    .login-card {
        max-width: 100%;
        padding: var(--spacing-xl) var(--spacing-lg);
        border-radius: var(--radius-lg);
    }

    .login-title {
        font-size: var(--font-size-lg);
    }
}

@media (min-width: 768px) {
    .login-card {
        max-width: 480px;
        padding: var(--spacing-2xl) var(--spacing-2xl);
    }
}

@media (min-width: 1024px) {
    .login-card {
        max-width: 520px;
        padding: 56px 48px;
    }

    .login-title {
        font-size: 1.75rem;
    }

    .login-title-sub {
        font-size: 1rem;
    }
}

@media (min-width: 1440px) {
    .login-card {
        max-width: 560px;
        padding: 64px 56px;
    }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
    .login-card,
    .error-message {
        animation: none;
    }

    .login-btn {
        transition: none;
    }
}