/* =================================================================
   LOGIN PAGE - DARK THEME
   ================================================================= */

/* CSS Custom Properties for Login Page */
:root {
    /* Login Page Colors */
    --login-bg-overlay: rgba(0, 0, 0, 0.6);
    --login-card-bg: rgba(45, 45, 45, 0.95);
    --login-card-border: rgba(64, 64, 64, 0.5);
    --login-text-primary: #ffffff;
    --login-text-secondary: #b3b3b3;
    --login-text-muted: #888888;
    --login-error-bg: rgba(239, 68, 68, 0.2);
    --login-error-text: #fca5a5;
    --login-error-border: rgba(239, 68, 68, 0.4);
    
    /* Discord Button Colors */
    --discord-primary: #5865F2;
    --discord-hover: #4752C4;
    --discord-shadow: rgba(88, 101, 242, 0.4);
    --discord-shadow-hover: rgba(88, 101, 242, 0.5);
    
    /* Spacing & Sizing */
    --login-card-max-width: 420px;
    --login-card-padding: 48px 40px;
    --login-card-padding-mobile: 32px 24px;
    --login-card-radius: 20px;
    --login-card-radius-mobile: 16px;
    --login-title-size: 48px;
    --login-title-size-mobile: 36px;
    
    /* Shadows & Effects */
    --login-card-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    --login-backdrop-blur: blur(20px);
    
    /* Gradients */
    --login-title-gradient: linear-gradient(135deg, #3b82f6, #60a5fa);
    --login-shimmer-gradient: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

/* =================================================================
   LOGIN PAGE LAYOUT
   ================================================================= */

body.login-page {
    background-image: url('/static/media/bg.webp') !important;
    background-size: cover !important;
    background-position: center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    background-color: #1a1a1a !important; /* Fallback */
    min-height: 100vh !important;
    margin: 0 !important;
    padding: 0 !important;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

body.login-page::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--login-bg-overlay);
    z-index: 1;
}

.login-container {
    width: 100%;
    max-width: var(--login-card-max-width);
    position: relative;
    z-index: 2;
    padding: 20px;
}

/* =================================================================
   LOGIN CARD
   ================================================================= */

.login-card {
    background: var(--login-card-bg) !important;
    border-radius: var(--login-card-radius);
    padding: var(--login-card-padding);
    box-shadow: var(--login-card-shadow);
    backdrop-filter: var(--login-backdrop-blur);
    border: 1px solid var(--login-card-border);
    text-align: center;
    position: relative;
    animation: loginCardAppear 0.8s ease-out;
}

/* Fallback for browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(20px)) {
    .login-card {
        background: rgba(45, 45, 45, 0.98) !important;
    }
}

/* =================================================================
   LOGIN HEADER
   ================================================================= */

.login-header {
    margin-bottom: 40px;
}

.login-title {
    font-size: var(--login-title-size);
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -1px;
    
    /* Gradient text effect */
    background: var(--login-title-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Fallback for browsers without background-clip support */
@supports not (-webkit-background-clip: text) {
    .login-title {
        color: var(--login-text-primary) !important;
        background: none;
    }
}

.login-subtitle {
    font-size: 16px;
    color: var(--login-text-secondary) !important;
    margin: 0;
    font-weight: 400;
}

/* =================================================================
   LOGIN CONTENT
   ================================================================= */

.login-content {
    margin-bottom: 32px;
}

.discord-login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 16px 24px;
    background: var(--discord-primary);
    color: white !important;
    text-decoration: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--discord-shadow);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}

.discord-login-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    left: -100%;
    background: var(--login-shimmer-gradient);
    transition: left 0.5s ease;
}

.discord-login-btn:hover {
    background: var(--discord-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--discord-shadow-hover);
    color: white !important;
}

.discord-login-btn:hover::before {
    left: 100%;
}

.discord-login-btn:active {
    transform: translateY(0);
}

.discord-login-btn:focus {
    outline: 2px solid var(--discord-primary);
    outline-offset: 2px;
}

.discord-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    fill: currentColor;
}

.login-text {
    font-weight: 600;
    letter-spacing: 0.025em;
    color: white !important;
}

/* =================================================================
   ERROR HANDLING
   ================================================================= */

.login-error {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    padding: 12px 16px;
    background: var(--login-error-bg);
    color: var(--login-error-text) !important;
    border-radius: 8px;
    font-size: 14px;
    border: 1px solid var(--login-error-border);
    backdrop-filter: var(--login-backdrop-blur);
}

.error-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    fill: currentColor;
}

/* =================================================================
   LOGIN FOOTER
   ================================================================= */

.login-footer {
    padding-top: 24px;
    border-top: 1px solid var(--login-card-border);
}

.login-help {
    font-size: 14px;
    color: var(--login-text-muted) !important;
    margin: 0;
    line-height: 1.5;
}

/* =================================================================
   ANIMATIONS
   ================================================================= */

@keyframes loginCardAppear {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* =================================================================
   ACCESSIBILITY
   ================================================================= */

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    .login-card {
        animation: none;
    }
    
    .discord-login-btn {
        transition: none;
    }
    
    .discord-login-btn::before {
        transition: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .login-card {
        border: 2px solid var(--login-text-primary);
    }
    
    .discord-login-btn {
        border: 2px solid var(--discord-primary);
    }
}

/* =================================================================
   RESPONSIVE DESIGN
   ================================================================= */

@media (max-width: 480px) {
    body.login-page {
        background-attachment: scroll !important;
    }

    .login-card {
        padding: var(--login-card-padding-mobile);
        border-radius: var(--login-card-radius-mobile);
        margin: 0 16px;
    }

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

    .discord-login-btn {
        padding: 14px 20px;
        font-size: 15px;
    }
}

@media (max-width: 360px) {
    .login-container {
        padding: 12px;
    }
    
    .login-card {
        padding: 24px 20px;
        margin: 0 8px;
    }
    
    .login-title {
        font-size: 32px;
    }
}

/* =================================================================
   PERFORMANCE OPTIMIZATIONS
   ================================================================= */

/* GPU acceleration for smooth animations */
.login-card,
.discord-login-btn {
    transform: translateZ(0);
    will-change: transform;
}

/* Optimize background image loading */
body.login-page {
    background-image: url('/static/media/bg.webp');
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Preload critical animations */
.discord-login-btn::before {
    content: '';
    transform: translateZ(0);
}

/* =================================================================
   UTILITY CLASSES FOR LOGIN PAGE
   ================================================================= */

.login-page .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.login-page .focus-visible {
    outline: 2px solid var(--discord-primary);
    outline-offset: 2px;
}

/* =================================================================
   PRINT STYLES
   ================================================================= */

@media print {
    body.login-page {
        background: white !important;
        color: black !important;
    }
    
    body.login-page::before {
        display: none;
    }
    
    .login-card {
        background: white !important;
        border: 2px solid black;
        box-shadow: none;
    }
    
    .discord-login-btn {
        background: #5865F2 !important;
        -webkit-print-color-adjust: exact;
        color-adjust: exact;
    }
}