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

:root {
    --primary-color: #f74040;
    --primary-dark: #e63535;
    --primary-light: #ff6b6b;
    --secondary-color: #2c3e50;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --text-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e9ecef;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --success-color: #27ae60;
    --error-color: #e74c3c;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    height: 40px;
    width: 35px;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-dark);
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: 6px;
}

.nav-link:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 140px);
    display: flex;
    align-items: center;
    padding: 2rem 20px;
}

.login-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 600px;
    background: var(--bg-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Left Side - Branding */
.login-branding {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--text-white);
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.login-branding::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-10px, -10px) rotate(1deg); }
    66% { transform: translate(10px, -5px) rotate(-1deg); }
}

.branding-content {
    position: relative;
    z-index: 2;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.logo-large {
    height: 60px;
    width: auto;
    filter: brightness(0) invert(1);
}

.brand-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-white);
}

.welcome-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.welcome-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.5;
}

.feature-highlights {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
}

.highlight-icon {
    width: 24px;
    height: 24px;
    color: var(--text-white);
    opacity: 0.9;
}

.highlight-icon svg {
    width: 100%;
    height: 100%;
}

/* Right Side - Login Form */
.login-form-section {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.form-container {
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.form-subtitle {
    color: var(--text-light);
    font-size: 1rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.9rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 12px;
    width: 20px;
    height: 20px;
    color: var(--text-light);
    z-index: 2;
}

.input-icon svg {
    width: 100%;
    height: 100%;
}

.form-input {
    width: 100%;
    padding: 12px 12px 12px 44px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--bg-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(247, 64, 64, 0.1);
}

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

.password-toggle {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-light);
    transition: var(--transition);
    z-index: 2;
}

.password-toggle:hover {
    color: var(--primary-color);
}

.password-toggle svg {
    width: 20px;
    height: 20px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0.5rem 0;
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.checkbox-wrapper input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: var(--transition);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-white);
    font-size: 12px;
    font-weight: 600;
}

.checkbox-label {
    color: var(--text-dark);
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.forgot-password:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.login-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--text-white);
    border: none;
    padding: 14px 24px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.login-button.loading {
    pointer-events: none;
}

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

.login-button.loading .button-loader {
    display: flex !important;
}

.button-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--text-white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.form-divider {
    text-align: center;
    position: relative;
    margin: 1rem 0;
}

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

.form-divider span {
    background-color: var(--bg-white);
    padding: 0 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.alternative-actions {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.signup-prompt,
.student-prompt {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0;
}

.signup-link,
.student-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.signup-link:hover,
.student-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: var(--text-white);
    padding: 40px 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo .logo-text {
    color: var(--text-white);
}

.footer-text {
    color: #bdc3c7;
    margin: 0;
    text-align: center;
}

/* Error States */
.form-input.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.error-message svg {
    width: 16px;
    height: 16px;
}

/* Success States */
.form-input.success {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(39, 174, 96, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-container {
        grid-template-columns: 1fr;
        margin: 1rem;
    }

    .login-branding {
        padding: 2rem;
        text-align: center;
    }

    .welcome-title {
        font-size: 2rem;
    }

    .login-form-section {
        padding: 2rem;
    }

    .form-options {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 1rem 0;
    }

    .login-container {
        margin: 0.5rem;
    }

    .login-branding,
    .login-form-section {
        padding: 1.5rem;
    }

    .welcome-title {
        font-size: 1.75rem;
    }

    .form-title {
        font-size: 1.5rem;
    }

    .brand-title {
        font-size: 1.5rem;
    }

    .logo-large {
        height: 50px;
    }

    .login-branding {
        display: none;
    }
}