/* --- Monochrome Palette --- */
:root {
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --medium-gray: #cccccc;
    --dark-gray: #555555;
    --almost-black: #222222;
    --black: #000000;
}

/* --- Login Window --- */
#login_window {
    padding: 20px;
    width: 40%;
    margin: 0 auto;
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2),
                0 6px 20px rgba(0, 0, 0, 0.19);
}

#login_window label {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--almost-black);
}

/* --- Message Box --- */
#message {
    padding: 10px;
    background-color: var(--light-gray);
    color: var(--almost-black);
    border-radius: 8px;
    text-align: center;
}

/* --- Records / Details --- */
#records {
    width: 100%;
    height: 80%;
    overflow-y: auto;
    background-color: var(--white);
    border-radius: 8px;
}

.hilite {
    background-color: var(--light-gray);
    color: var(--white);
}

#details {
    width: 100%;
    height: 40%;
    overflow-y: auto;
    border: 1px solid var(--medium-gray);
    background-color: var(--light-gray);
}

/* --- Navbar --- */
.custom-navbar {
    background-color: var(--almost-black);
    border: none;
}

.navbar-inverse .navbar-nav > .dropdown > a:focus,
.navbar-inverse .navbar-nav > .dropdown > a:hover {
    background-color: var(--dark-gray) !important;
    color: var(--white) !important;
}

/* --- Login Button --- */
.btn_login {
    background-color: var(--dark-gray);
    border-radius: 20px;
    border: none;
    width: 100%;
    color: var(--white);
    padding: 6px 12px;
    font-weight: bold;
    transition: 0.3s;
}

.btn_login:hover {
    background-color: var(--almost-black);
    color: var(--white);
}

/* --- Input Container --- */
.input_container {
    width: 90%;
    margin: 0 auto;
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2),
                0 6px 20px rgba(0, 0, 0, 0.19);
    padding: 30px;
    margin-top: 30px;
}

/* --- Inputs --- */
input.form-control {
    border: 2px solid var(--medium-gray);
    border-radius: 8px;
    padding: 10px;
    color: var(--almost-black);
    background-color: var(--white);
}

input.form-control:focus {
    border-color: var(--dark-gray);
    box-shadow: 0 0 5px var(--dark-gray);
    outline: none;
}

/* --- Table Text --- */
td {
    color: var(--almost-black);
}

/* --- General Button Style (for modals, etc.) --- */
.btn {
    background-color: var(--dark-gray);
    color: var(--white);
    border: none;
    border-radius: 10px;
    padding: 10px 18px;
    font-weight: bold;
    transition: 0.3s;
}

.btn:hover {
    background-color: var(--almost-black);
    color: var(--white);
}

.btn:disabled {
    background-color: var(--medium-gray);
    color: var(--white);
    cursor: not-allowed;
}

/* --- Modal --- */
.modal-content {
    background-color: var(--white);
    color: var(--almost-black);
    border-radius: 10px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.modal-footer {
    border-top: 1px solid var(--medium-gray);
}