/* Modern Authentication Pages CSS - Premium Design */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #2563eb;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1d4ed8;
    --secondary-gray: #64748b;
    --accent-gray: #94a3b8;
    --light-gray: #f8fafc;
    --white: #ffffff;
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --success: #059669;
    --error: #dc2626;
    --warning: #d97706;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 25%, #cbd5e1 50%, #94a3b8 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
}

.bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.4;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(147, 51, 234, 0.06) 0%, transparent 50%);
    z-index: 0;
}

.auth-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 30px 48px;
    width: 100%;
    max-width: 460px;
    box-shadow: var(--shadow-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-container:hover {
    transform: translateY(-1px);
    box-shadow: 0 32px 64px -12px rgba(0, 0, 0, 0.25);
}

.auth-container.signup {
    max-width: 600px;
    padding: 24px 32px;
}

.auth-container.signup .logo-section {
    margin-bottom: 20px;
}

.auth-container.signup .logo-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 12px;
}

.auth-container.signup .logo-icon i {
    font-size: 1.5rem;
}

.auth-container.signup .logo-title {
    font-size: 1.75rem;
    margin-bottom: 6px;
}

.auth-container.signup .logo-subtitle {
    font-size: 0.9375rem;
    margin-top: 4px;
}

.auth-container.signup .form-group {
    margin-bottom: 18px;
}

.auth-container.signup .form-label {
    margin-bottom: 5px;
    font-size: 0.875rem;
}

.auth-container.signup .form-control {
    padding: 12px 16px 12px 44px;
    font-size: 0.9375rem;
}

.auth-container.signup .auth-btn {
    padding: 14px 20px;
    font-size: 1rem;
    margin-top: 8px;
}

.auth-container.signup .auth-footer {
    margin-top: 20px;
}

.auth-container.signup .terms-checkbox {
    margin-bottom: 6px;
}

.auth-container.signup .checkbox-container {
    margin-bottom: 12px;
}

.auth-container.signup .checkbox-label {
    font-size: 0.875rem;
    line-height: 1.4;
}

/* For page not found - centered content */
.auth-container.error-page {
    max-width: 500px;
    text-align: center;
}

.logo-section {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.logo-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 50%, #8b5cf6 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
    border-radius: 20px;
}

.logo-icon:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 16px 48px rgba(37, 99, 235, 0.4);
}

.logo-icon i {
    font-size: 2rem;
    color: var(--white);
    position: relative;
    z-index: 1;
}

.logo-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
    margin-top: 12px;
    font-weight: 500;
}

.form-group {
    margin-bottom: 28px;
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
}

.input-wrapper {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 16px 20px 16px 52px;
    border: 2px solid var(--border-light);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    backdrop-filter: blur(10px);
}

.form-control::placeholder {
    color: var(--text-muted);
    font-weight: 400;
    opacity: 0.7;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1), 0 4px 16px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px); 
}

select.form-control {
    cursor: pointer;
}

select.form-control option {
    background: var(--white);
    color: var(--text-primary);
    padding: 10px;
}

.form-control.is-invalid {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
    background: #fef2f2;
}

.form-control.is-valid {
    border-color: var(--success);
    background: #f0fdf4;
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

.form-control.is-valid:focus {
    border-color: var(--success);
    background: #f0fdf4;
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
}

.input-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.125rem;
    z-index: 2;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-control:focus + .input-icon {
    color: var(--primary-blue);
    transform: translateY(-50%) scale(1.1);
}

.password-toggle {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 6px;
    border-radius: 6px;
    z-index: 2;
}

.password-toggle:hover {
    color: var(--primary-blue);
    background: rgba(37, 99, 235, 0.1);
    transform: translateY(-50%) scale(1.1);
}

.validation-icon {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--success);
    font-size: 1.25rem;
    z-index: 2;
    animation: scaleIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes scaleIn {
    from {
        transform: translateY(-50%) scale(0);
        opacity: 0;
    }
    to {
        transform: translateY(-50%) scale(1);
        opacity: 1;
    }
}

/* Checkbox styles */
.remember-me {
    display: flex;
    align-items: center;
    margin-bottom: 24px;
    gap: 10px;
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin: 0;
    cursor: pointer;
    accent-color: var(--primary-blue);
}

.form-check-label {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
    margin: 0;
}

.terms-checkbox {
    margin-bottom: 8px;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    position: relative;
    padding: 4px 0;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkbox-checkmark {
    position: relative;
    height: 22px;
    min-width: 22px;
    width: 22px;
    background-color: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--border-medium);
    border-radius: 7px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 2px;
    backdrop-filter: blur(10px);
}

.checkbox-container:hover .checkbox-checkmark {
    border-color: var(--primary-blue-light);
    background-color: rgba(255, 255, 255, 0.95);
    transform: scale(1.05);
}

.checkbox-container input:checked ~ .checkbox-checkmark {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    border-color: var(--primary-blue);
    transform: scale(1.05);
}

.checkbox-checkmark::after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-container input:checked ~ .checkbox-checkmark::after {
    display: block;
}

.checkbox-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    flex: 1;
}

.terms-link {
    color: var(--primary-blue);
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 500;
}

.terms-link:hover {
    color: var(--primary-blue-dark);
    text-decoration: underline;
}

/* Button styles */
.auth-btn {
    width: 100%;
    padding: 18px 24px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 50%, #8b5cf6 100%);
    color: var(--white);
    border: none;
    border-radius: 14px;
    font-size: 1.0625rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.3);
    letter-spacing: 0.02em;
    text-transform: none;
}

.auth-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.auth-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(37, 99, 235, 0.4);
}

.auth-btn:hover:not(:disabled)::before {
    left: 100%;
}

.auth-btn:active {
    transform: translateY(-1px);
}

.auth-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.2);
}

.auth-btn:disabled:hover {
    transform: none;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.2);
}

.btn-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer links */
.auth-footer {
    text-align: center;
    margin-top: 32px;
}

.auth-footer a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 10px 16px;
    border-radius: 8px;
    display: inline-block;
    position: relative;
}

.auth-footer a:hover {
    color: var(--primary-blue);
    background: rgba(37, 99, 235, 0.08);
    transform: translateY(-1px);
}

.auth-footer span {
    color: var(--text-muted);
    font-size: 0.9375rem;
    font-weight: 500;
}

/* Loading overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    z-index: 10;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-light);
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Row spacing for multi-column forms */
.row {
    margin-left: -8px;
    margin-right: -8px;
}

.row > [class*="col-"] {
    padding-left: 8px;
    padding-right: 8px;
}

/* Password strength indicator */
.password-strength {
    margin-top: 8px;
}

.strength-requirements {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.requirement {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    transition: all 0.2s ease;
}

.requirement.met {
    color: var(--success);
}

.requirement.unmet {
    color: var(--text-muted);
}

.requirement i {
    font-size: 0.875rem;
}

/* Error page styles */
.error-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--error), #ef4444);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: var(--shadow-md);
}

.error-icon i {
    font-size: 2.5rem;
    color: var(--white);
}

.error-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.error-message {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 32px;
    line-height: 1.6;
}

/* Modal styles for auth pages */
.modal-content {
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    border-bottom: 1px solid var(--border-light);
    background: var(--light-gray);
}

.modal-body {
    background: var(--white);
}

.modal-footer {
    border-top: 1px solid var(--border-light);
    background: var(--light-gray);
}

/* Responsive styles */
@media (max-width: 768px) {
    .auth-container {
        margin: 24px;
        padding: 48px 36px;
        border-radius: 20px;
    }
    
    .auth-container.signup {
        max-width: 100%;
    }
    
    .logo-title {
        font-size: 2rem;
    }
    
    .logo-icon {
        width: 72px;
        height: 72px;
    }
    
    .logo-icon i {
        font-size: 1.875rem;
    }
    
    .form-control {
        padding: 14px 18px 14px 48px;
        font-size: 0.9375rem;
    }
    
    .input-icon {
        left: 16px;
        font-size: 1rem;
    }
    
    .validation-icon {
        right: 16px;
        font-size: 1.125rem;
    }
    
    .auth-btn {
        padding: 16px 20px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .auth-container {
        margin: 20px;
        padding: 20px 28px;
        border-radius: 16px;
    }
    
    .logo-icon {
        width: 64px;
        height: 64px;
        margin-bottom: 20px;
    }
    
    .logo-icon i {
        font-size: 1.75rem;
    }
    
    .logo-title {
        font-size: 1.875rem;
    }
    
    .logo-subtitle {
        font-size: 1rem;
    }
    
    .auth-btn {
        padding: 16px 20px;
        font-size: 1rem;
    }
    
    .row > [class*="col-"] {
        margin-bottom: 0;
    }
}