:root {
    --bg-color: #0f151e; /* Fundo principal bem escuro */
    --card-bg: #151c26;  /* Fundo do card um pouco mais claro */
    --card-border: #1f2937; /* Borda sutil do card */
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --primary-yellow: #ffb700; /* Amarelo da sua logo/botão */
    --primary-yellow-hover: #e5a500;
    --input-bg: #0a0e14; /* Fundo do input mais escuro que o card */
    --input-border: #1f2937;
    --error-color: #ef4444;
}

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

body {
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.brand-header {
    text-align: center;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo-placeholder {
    width: 45px;
    height: 45px;
    background-color: var(--primary-yellow);
    color: #000000;
    font-size: 22px;
    font-weight: 700;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    margin-bottom: 20px;
}

.brand-header h2 {
    color: var(--text-main);
    font-size: 22px;
    font-weight: 600;
}

.brand-header p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 8px;
}

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

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-main);
    font-weight: 500;
    font-size: 13px;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s ease;
    font-size: 14px;
}

.input-group input::placeholder {
    color: #4b5563;
}

.input-group input:focus {
    border-color: var(--primary-yellow);
}

.btn-login {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-yellow);
    color: #000000;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 10px;
}

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

.btn-login:disabled {
    background-color: #8a6500;
    color: #b0b0b0;
    cursor: not-allowed;
}

.error-message {
    color: var(--error-color);
    font-size: 13px;
    text-align: center;
    margin-bottom: 15px;
    min-height: 20px;
    display: none;
}