:root {
    --primary: #0F5E36; /* Embrapa Green */
    --primary-hover: #0B4A2A;
    --secondary: #0A58CA; /* Embrapa Blue */
    --background: #f4f6f9;
    --text-dark: #2D3748;
    --text-muted: #718096;
    --border-color: #E2E8F0;
    --error-bg: #FFF5F5;
    --error-border: #FEB2B2;
    --error-text: #C53030;
    --success-bg: #F0FFF4;
    --success-border: #9AE6B4;
    --success-text: #22543D;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #eef5f1 0%, #dbeae2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-dark);
}

.container {
    width: 100%;
    max-width: 480px;
}

.card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 16px -6px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
}

.card-header {
    padding: 32px 32px 20px 32px;
    text-align: center;
    border-bottom: 1px solid #F7FAFC;
}

.logo-container {
    margin-bottom: 16px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-container img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.logo-fallback {
    font-weight: 700;
    font-size: 20px;
    color: var(--primary);
    letter-spacing: 0.5px;
}

.title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.card-body {
    padding: 24px 32px 32px 32px;
}

.alert {
    padding: 14px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.875rem;
    line-height: 1.5;
    border: 1px solid transparent;
    display: flex;
    align-items: flex-start;
}

.alert-error {
    background-color: var(--error-bg);
    border-color: var(--error-border);
    color: var(--error-text);
}

.alert-success {
    background-color: var(--success-bg);
    border-color: var(--success-border);
    color: var(--success-text);
}

.alert-icon {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    flex-shrink: 0;
}

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.input-group {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-dark);
    background-color: #FCFDFE;
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15, 94, 54, 0.15);
    background-color: #ffffff;
}

#captcha {
    text-transform: uppercase;
}

/* Captcha specific layout */
.captcha-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

.captcha-img-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    height: 45px;
    background: #f7fafc;
}

.captcha-img {
    display: block;
    height: 100%;
}

.btn-refresh-captcha {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.2s;
}

.btn-refresh-captcha:hover {
    background-color: #edf2f7;
    color: var(--text-dark);
    border-color: #cbd5e0;
}

.btn-refresh-captcha svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.btn-refresh-captcha:active svg {
    transform: rotate(180deg);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(15, 94, 54, 0.1), 0 2px 4px -1px rgba(15, 94, 54, 0.06);
}

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    margin-top: 12px;
}

.btn-outline:hover {
    background-color: #f7fafc;
    color: var(--text-dark);
    border-color: #cbd5e0;
}

.footer-links {
    text-align: center;
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links a {
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.15s ease;
}

.footer-links a:hover {
    color: #0d6efd;
    text-decoration: underline;
}