:root {
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --primary: #e74c3c;
    --primary-light: #c0392b;
    --text-main: #2c3e50;
    --text-muted: #7f8c8d;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-card {
    background: var(--card-bg);
    border: none;
    border-radius: 16px;
    padding: 40px 25px 30px 25px;
    width: 100%;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    box-sizing: border-box;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    color: var(--text-main);
    font-size: 1.2rem;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s;
}
.close-btn:hover {
    color: var(--primary-light);
}

.logo {
    font-family: 'Inter', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0 0 10px 0;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 30px;
    line-height: 1.5;
}

.input-group {
    background: #f8f9fa;
    border: 1px solid #ced4da;
    border-radius: 12px;
    display: flex;
    align-items: center;
    padding: 12px 20px;
    margin-bottom: 25px;
}

.input-group i {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-right: 15px;
}

.input-group input {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    width: 100%;
    outline: none;
}

.input-group input::placeholder {
    color: #adb5bd;
}

.hidden {
    display: none !important;
}

.primary-btn {
    background-color: var(--primary);
    color: #fff;
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    font-family: 'Inter', sans-serif;
}

.primary-btn:active {
    transform: scale(0.98);
}
.primary-btn:disabled {
    background-color: #4f46e5;
    cursor: not-allowed;
}