/* =================================
   SYNTHASIS — LOGIN PAGE
   ================================= */

/* Page Layout */
body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--bg-primary) 0%, #e0e7ff 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    display: flex;
    width: 90%;
    max-width: 1000px;
    height: 580px;
    background: var(--surface-primary);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--border-primary);
    animation: fadeIn var(--transition-slow) ease-out;
}

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

/* Left Panel - Branding */
.left-panel {
    flex: 1.3;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-3xl) var(--space-2xl);
    color: var(--text-on-brand);
}

.left-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(67, 56, 202, 0.85) 0%, rgba(14, 165, 233, 0.85) 100%);
    z-index: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.branding-content {
    position: relative;
    z-index: 1;
    max-width: 85%;
}

.branding-content h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    margin-top: 390px;
    color: var(--text-on-brand);
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.branding-content p {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.95);
    line-height: var(--line-height-relaxed);
    margin-top: var(--space-lg);
    font-weight: var(--font-weight-medium);
}

/* Right Panel - Login Form */
.right-panel {
    flex: 1;
    background: var(--surface-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-3xl) var(--space-2xl);
}

.login-container {
    width: 100%;
    max-width: 380px;
}

.login-heading {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--brand-primary);
    text-align: center;
    margin-bottom: var(--space-2xl);
    letter-spacing: -0.02em;
}

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

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.form-group input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    background: var(--bg-primary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: var(--transition-base);
}

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

.form-group input:hover {
    border-color: var(--border-secondary);
    background: var(--surface-primary);
}

.form-group input:focus {
    border-color: var(--brand-primary);
    outline: none;
    background: var(--surface-primary);
    box-shadow: 0 0 0 4px rgba(67, 56, 202, 0.1);
}

/* Login Button */
.login-btn {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
    border: none;
    padding: var(--space-lg) 0;
    border-radius: var(--radius-xl);
    color: var(--text-on-brand);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.01em;
    cursor: pointer;
    width: 100%;
    margin-top: var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.login-btn::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    pointer-events: none;
    border-radius: var(--radius-xl);
    transition: opacity var(--transition-base);
    opacity: 1;
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--brand-primary-hover) 0%, var(--brand-accent-hover) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

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

/* Forgot Password Link */
.forgot-password {
    text-align: right;
    margin-top: var(--space-sm);
}

.forgot-password a {
    color: var(--brand-accent);
    font-size: var(--font-size-sm);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.forgot-password a:hover {
    color: var(--brand-accent-hover);
    text-decoration: underline;
}

/* Divider */
.divider {
    text-align: center;
    margin: var(--space-2xl) 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-primary);
}

.divider span {
    background: var(--surface-primary);
    padding: 0 var(--space-lg);
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    position: relative;
    z-index: 1;
}

/* Google Sign-In */
.g_id_signin {
    display: flex;
    justify-content: center;
    margin: var(--space-xl) 0;
}

/* Custom Google Button (if needed) */
.google-signin-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    background-color: var(--surface-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition-base);
    margin: var(--space-xl) 0;
    box-shadow: var(--shadow-xs);
}

.google-signin-btn:hover {
    background-color: var(--bg-primary);
    border-color: var(--border-secondary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.google-signin-btn:active {
    background-color: var(--bg-secondary);
    border-color: var(--border-secondary);
    transform: translateY(0);
}

.google-icon {
    margin-right: var(--space-md);
    flex-shrink: 0;
}

/* Register Redirect */
.register-redirect {
    text-align: center;
    margin-top: var(--space-xl);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.register-redirect a {
    color: var(--brand-primary);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    transition: color var(--transition-fast);
}

.register-redirect a:hover {
    color: var(--brand-primary-hover);
    text-decoration: underline;
}

/* Error Message */
.error-message {
    background: var(--danger-bg);
    color: var(--danger);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
    border-left: 4px solid var(--danger);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    animation: slideDown var(--transition-base) ease;
}

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

/* Responsive - Tablet */
@media (max-width: 1024px) {
    .container {
        max-width: 900px;
    }
}

/* Responsive - Mobile */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
        height: auto;
        width: 95%;
        max-width: 480px;
    }

    .left-panel {
        display: none;
    }

    .right-panel {
        padding: var(--space-3xl) var(--space-xl);
    }

    .login-container {
        max-width: 100%;
    }

    .login-heading {
        font-size: var(--font-size-2xl);
    }

    .branding-content h1 {
        font-size: var(--font-size-3xl);
    }
}

/* Responsive - Small Mobile */
@media (max-width: 480px) {
    .right-panel {
        padding: var(--space-2xl) var(--space-lg);
    }

    .login-heading {
        font-size: var(--font-size-xl);
        margin-bottom: var(--space-xl);
    }

    .form-group input {
        padding: var(--space-md);
    }

    .login-btn {
        padding: var(--space-md) 0;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .login-btn,
    .google-signin-btn {
        min-height: 44px;
    }

    .form-group input {
        min-height: 44px;
    }
}

/* Accessibility */
.login-btn:focus-visible,
.form-group input:focus-visible,
.google-signin-btn:focus-visible,
.forgot-password a:focus-visible,
.register-redirect a:focus-visible {
    outline: 3px solid var(--brand-primary);
    outline-offset: 2px;
}

/* Loading State */
.login-btn.loading {
    position: relative;
    color: transparent;
}

.login-btn.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--text-on-brand);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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