/* ===================================
   Modern MMT Login CSS
   Version: 2.0.0
   Features: Dark mode, Material design, Animations
   =================================== */

/* CSS Custom Properties */
:root {
    /* Light Theme Colors */
    --color-primary: #1976d2;
    --color-primary-hover: #1565c0;
    --color-secondary: #424242;
    --color-accent: #ff5722;
    --color-success: #00bf9a;
    --color-warning: #ff9800;
    --color-error: #f44336;
    
    /* Background Colors */
    --color-background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --color-surface: #ffffff;
    --color-card: #ffffff;
    
    /* Text Colors */
    --color-text-primary: #212121;
    --color-text-secondary: #757575;
    --color-text-disabled: #bdbdbd;
    --color-text-inverse: #ffffff;
    
    /* Border Colors */
    --color-border: #e0e0e0;
    --color-border-focus: var(--color-primary);
    
    /* Typography */
    --font-family: 'Varela Round', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    
    /* Layout */
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-sm: 6px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --color-surface: #1e1e1e;
    --color-card: #2d2d2d;
    
    --color-text-primary: #e0e0e0;
    --color-text-secondary: #a0a0a0;
    --color-text-disabled: #666666;
    
    --color-border: #404040;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
}

/* Font Face */
@font-face {
    font-family: 'Varela Round';
    font-display: swap;
    font-style: normal;
    font-weight: 400;
    src: url('../fonts/varela.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
    font-size: 16px;
    line-height: 1.5;
}

body {
    font-family: var(--font-family);
    background: var(--color-background);
    color: var(--color-text-primary);
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Layout */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-4);
    position: relative;
    z-index: 2;
}

.login-card {
    background: var(--color-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    padding: var(--space-8);
    position: relative;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Theme Toggle */
.theme-toggle {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-lg);
    padding: var(--space-2);
    border-radius: 50%;
    transition: var(--transition-fast);
    z-index: 10;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

/* Header */
.login-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 400;
    margin-bottom: var(--space-2);
    color: var(--color-primary);
}

.logo .cms {
    color: var(--color-accent);
    font-weight: 300;
}

.login-subtitle {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Messages */
.message {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-6);
    animation: messageSlide 0.3s ease-out;
}

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

.message-error {
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid rgba(244, 67, 54, 0.3);
    color: var(--color-error);
}

.message-success {
    background: rgba(0, 191, 154, 0.1);
    border: 1px solid rgba(0, 191, 154, 0.3);
    color: var(--color-success);
}

.message-icon {
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.message-content {
    flex: 1;
    font-size: var(--font-size-sm);
}

/* Form Styles */
.login-form {
    margin-bottom: var(--space-6);
}

.form-group {
    margin-bottom: var(--space-6);
}

.input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: var(--space-4) var(--space-4) var(--space-3) var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: var(--transition);
    outline: none;
    min-height: 56px; /* Touch-friendly */
}

.form-input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label,
.form-input.has-value + .form-label {
    transform: translateY(-28px) scale(0.85);
    color: var(--color-border-focus);
    background: var(--color-card);
    padding: 0 var(--space-2);
}

.form-label {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    pointer-events: none;
    transition: var(--transition);
    transform-origin: left center;
    z-index: 1;
}

.input-highlight {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-border-focus);
    transition: var(--transition);
    transform: translateX(-50%);
}

.form-input:focus ~ .input-highlight {
    width: 100%;
}

/* Password Toggle */
.password-toggle {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    border-radius: 50%;
    transition: var(--transition-fast);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    min-width: 44px; /* Touch-friendly */
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--color-text-primary);
}

/* Button Styles */
.form-actions {
    margin-top: var(--space-8);
}

.btn-login {
    width: 100%;
    min-height: 56px; /* Touch-friendly */
    padding: var(--space-4) var(--space-6);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border: none;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.btn-login:hover:not(:disabled) {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

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

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-login:active::before {
    width: 300px;
    height: 300px;
}

.btn-spinner {
    display: none;
    width: 20px;
    height: 20px;
}

.btn-login.loading .btn-text {
    opacity: 0;
}

.btn-login.loading .btn-spinner {
    display: block;
}

.spinner {
    width: 100%;
    height: 100%;
    color: currentColor;
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: var(--space-6);
}

.login-footer p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
}

/* Background Animation */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.bg-circle-1 {
    width: 100px;
    height: 100px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.bg-circle-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.bg-circle-3 {
    width: 80px;
    height: 80px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.6;
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
        opacity: 0.3;
    }
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-container {
        padding: var(--space-2);
    }
    
    .login-card {
        padding: var(--space-6);
        margin: var(--space-2);
    }
    
    .logo h1 {
        font-size: var(--font-size-xl);
    }
}

/* Loading States */
.form-input:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--color-error);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Focus Improvements */
.form-input:focus,
.password-toggle:focus,
.btn-login:focus,
.theme-toggle:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-text-secondary: #000000;
    }
    
    [data-theme="dark"] {
        --color-border: #ffffff;
        --color-text-secondary: #ffffff;
    }
}

/* Reduce Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}