* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #075E54;
    --primary-dark: #064E47;
    --primary-light: #25D366;
    --secondary: #34495E;
    --danger: #E74C3C;
    --success: #27AE60;
    --gray-100: #F8F9FA;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-400: #ADB5BD;
    --gray-500: #6C757D;
    --gray-600: #495057;
    --gray-700: #343A40;
    --text-dark: #111B21;
    --text-light: #8A8A8A;
    --border-radius: 12px;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.2);
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #075E54 0%, #025C4C 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-dark);
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #075E54 0%, #25D366 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
    margin: 0 auto 15px;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 5px;
}

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

.login-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(7, 94, 84, 0.1);
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 37px;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 16px;
    padding: 8px;
}

.btn-login {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #075E54 0%, #064E47 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(7, 94, 84, 0.3);
}

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

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

.login-divider {
    text-align: center;
    margin: 25px 0;
    position: relative;
}

.login-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gray-300);
}

.login-divider span {
    background: white;
    padding: 0 10px;
    color: var(--text-light);
    font-size: 14px;
    position: relative;
}

.btn-signup {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-signup:hover {
    background: var(--primary);
    color: white;
}

.login-note {
    text-align: center;
    font-size: 12px;
    color: var(--text-light);
    margin-top: 20px;
}

.error-message {
    background: #FEE;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
}

.error-message.show {
    display: block;
}

.loading-spinner {
    text-align: center;
    padding: 20px;
}

.spinner {
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

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

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal.show {
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 30px;
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.btn-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-light);
    cursor: pointer;
}

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

.signup-form .form-group small {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #075E54 0%, #064E47 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(7, 94, 84, 0.3);
}

@media (max-width: 480px) {
    .login-box {
        padding: 25px;
    }

    .login-header h1 {
        font-size: 24px;
    }

    .form-group input {
        font-size: 16px;
    }

    .modal-content {
        border-radius: var(--border-radius) var(--border-radius) 0 0;
    }
}