:root {
    --primary-color: #0b5030; /* Deep green */
    --primary-hover: #083c24;
    --text-color: #2c3e50;
    --text-light: #64748b;
    --error-color: #e74c3c;
    --white: #ffffff;
    --border-color: #d1d5db;
    --focus-ring: rgba(255, 255, 255, 0.25);
    --shadow-soft: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    --border-radius-lg: 20px;
    --border-radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: linear-gradient(rgba(11, 80, 48, 0.85), rgba(16, 185, 129, 0.85)), url('sksu1.webp') center/cover no-repeat fixed;
    background-color: #0b5030;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
}

.login-wrapper {
    width: 100%;
    padding: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-container {
    background: var(--white);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 460px;
    padding: 48px 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-soft);
}

.login-header {
    text-align: center;
    margin-bottom: 36px;
}

.logo-placeholder {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.login-header h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 8px;
    line-height: 1.3;
}

.login-header p {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
}

.input-group input, .input-group select {
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    color: var(--text-color);
    transition: var(--transition);
    outline: none;
    background-color: var(--white);
}

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

.input-group input:focus, .input-group select:focus {
    border-color: var(--primary-color);
    background-color: var(--white);
    box-shadow: 0 0 0 4px rgba(11, 80, 48, 0.1);
}

.input-group input.error {
    border-color: var(--error-color);
    background-color: #fff5f5;
}

.input-group input.error:focus {
    box-shadow: 0 0 0 4px rgba(231, 76, 60, 0.15);
}

.error-message {
    color: var(--error-color);
    font-size: 13px;
    display: none;
    margin-top: 4px;
    font-weight: 500;
}

.form-actions {
    margin-top: 12px;
}

.login-button {
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0, 78, 146, 0.1);
}

.login-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 78, 146, 0.2);
}

.login-button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 4px rgba(0, 78, 146, 0.1);
}

.form-links {
    margin-top: 28px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
}

.form-links a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.register-text {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .login-container {
        padding: 40px 24px;
        box-shadow: none; /* Might want to simplify on smaller screens, or keep a softer shadow */
    }

    .login-header h1 {
        font-size: 20px;
    }
}