/**
 * ATLAS System - Login Page Styles
 * Styles for the login page with Linux terminal aesthetic
 */

/* ==================== Login Container - ATLAS Terminal Theme ==================== */
.login-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #000000;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: 'A T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S\A\AA T L A S';
    white-space: pre;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Courier New', monospace;
    font-size: 8rem;
    font-weight: bold;
    color: rgba(74, 158, 255, 0.03);
    letter-spacing: 3rem;
    line-height: 8rem;
    text-align: center;
    pointer-events: none;
    z-index: 0;
    animation: atlasFloat 20s ease-in-out infinite;
}

.login-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent 0px,
            rgba(0, 255, 0, 0.01) 1px,
            transparent 2px,
            transparent 4px
        ),
        radial-gradient(
            ellipse at center,
            transparent 0%,
            rgba(0, 255, 0, 0.02) 50%,
            rgba(0, 0, 0, 0.5) 100%
        );
    pointer-events: none;
    z-index: 1;
}

@keyframes atlasFloat {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1); 
        opacity: 0.03;
    }
    50% { 
        transform: translate(-50%, -52%) scale(1.05); 
        opacity: 0.05;
    }
}

/* ==================== Login Box ==================== */
.login-box {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 3rem;
    max-width: 450px;
    width: 100%;
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 10;
}

.login-box::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--border-radius-lg);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s;
}

.login-box:hover::before {
    opacity: 0.3;
}

/* ==================== Login Header ==================== */
.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, #4a9eff 0%, #6cb4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: 4px;
    text-shadow: 0 0 20px rgba(74, 158, 255, 0.3);
}

.login-subtitle {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 500;
}

/* ==================== Terminal Prompt ==================== */
.terminal-prompt {
    color: var(--color-primary);
    font-family: var(--font-mono);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
}

.cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    background: var(--color-primary);
    animation: blink 1s infinite;
    margin-left: 4px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ==================== Login Form ==================== */
.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
}

.login-form input[type="text"],
.login-form input[type="password"] {
    width: 100%;
    padding: 0.875rem;
    background: var(--color-bg-main);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: var(--font-mono);
    transition: all 0.3s;
}

.login-form input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
    background: var(--color-bg-secondary);
}

.login-form input::placeholder {
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

/* ==================== Login Button ==================== */
.login-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
    background: linear-gradient(135deg, #4a9eff 0%, #3380dd 100%);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(74, 158, 255, 0.4);
}

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

.login-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ==================== Login Footer ==================== */
.login-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.login-footer a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.login-footer a:hover {
    color: var(--color-primary-light);
}

/* ==================== Back Link ==================== */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary);
    text-decoration: none;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.back-link:hover {
    color: var(--color-primary-light);
    transform: translateX(-3px);
}

.back-link::before {
    content: '←';
    font-size: 1.25rem;
}

/* ==================== Alert Styles ==================== */
.login-box .alert {
    margin-bottom: 1.5rem;
    padding: 0.875rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
}

/* ==================== Loading State ==================== */
.login-form.loading {
    opacity: 0.6;
    pointer-events: none;
}

.login-form.loading .login-btn::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid white;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== Responsive Design ==================== */
@media (max-width: 768px) {
    .login-container {
        padding: 1.5rem;
    }
    
    .login-box {
        padding: 2rem;
    }
    
    .login-logo {
        font-size: 3rem;
        letter-spacing: 2px;
    }
    
    .login-subtitle {
        font-size: 0.75rem;
    }
    
    .login-btn {
        padding: 0.875rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 1rem;
    }
    
    .login-box {
        padding: 1.5rem;
        max-width: 100%;
    }
    
    .login-logo {
        font-size: 2.5rem;
    }
    
    .terminal-prompt {
        font-size: 0.75rem;
    }
    
    .login-form input[type="text"],
    .login-form input[type="password"] {
        padding: 0.75rem;
        font-size: 0.875rem;
    }
}

/* ==================== Animations ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-box {
    animation: fadeIn 0.5s ease-out;
}

/* ==================== Terminal Effect ==================== */
.terminal-effect {
    position: relative;
}

.terminal-effect::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background: var(--color-primary);
    animation: scanline 3s linear infinite;
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

/* ==================== NFC Login Styles ==================== */
.nfc-login-section {
    margin-top: 1.5rem;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--color-border);
}

.divider span {
    padding: 0 1rem;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 600;
}

.nfc-login-btn {
    width: 100%;
    padding: 0.875rem;
    background: linear-gradient(135deg, #4a9eff 0%, #3380dd 100%);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 8px rgba(74, 158, 255, 0.3);
}

.nfc-login-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(74, 158, 255, 0.4);
}

.nfc-login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.nfc-status {
    margin-top: 1rem;
    padding: 0.875rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    text-align: center;
    font-family: var(--font-mono);
}

.nfc-status.nfc-scanning {
    background: rgba(74, 158, 255, 0.1);
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    animation: pulse 2s infinite;
}

.nfc-status.nfc-processing {
    background: rgba(255, 152, 0, 0.1);
    border: 1px solid var(--color-warning);
    color: var(--color-warning);
}

.nfc-status.nfc-success {
    background: rgba(76, 175, 80, 0.1);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}