:root {
    --paper-bg: #f7f3e8;
    --parchment: #ede6d6;
    --ink-dark: #1b1a18;
    --british-blue: #1c3144;
    --accent-red: #b93737;
    --border-line: #d1c7b7;
}

body {
    font-family: 'Courier Prime', monospace;
    background-color: #121518;
    color: var(--ink-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: radial-gradient(#222b36 1px, transparent 1px);
    background-size: 20px 20px;
}

.container {
    background: var(--paper-bg);
    padding: 35px;
    border-radius: 2px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.7), inset 0 0 40px rgba(185, 145, 90, 0.15);
    width: 480px;
    border: 1px solid #bfa888;
    position: relative;
}

/* Notebook margin line effect */
.container::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 35px;
    width: 2px;
    background: rgba(185, 55, 55, 0.25);
}

/* MASSIVE, IMPOSING BUREAUCRATIC STAMP */
.classified-stamp {
    color: var(--accent-red);
    border: 6px dashed var(--accent-red);
    padding: 15px 20px;
    font-family: 'Special Elite', cursive;
    font-size: 40px;
    text-align: center;
    letter-spacing: 5px;
    text-transform: uppercase;
    transform: rotate(-3deg);
    margin-bottom: 25px;
    opacity: 0.92;
    text-shadow: 3px 3px 0px rgba(185, 55, 55, 0.25);
    box-shadow: 0 0 20px rgba(185, 55, 55, 0.2);
    background: rgba(185, 55, 55, 0.05);
}

header {
    text-align: center;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--ink-dark);
    padding-bottom: 10px;
}

.codename {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--accent-red);
    font-weight: bold;
    text-transform: uppercase;
}

h1 {
    font-family: 'Special Elite', cursive;
    margin: 5px 0;
    font-size: 26px;
    color: var(--british-blue);
    letter-spacing: 1px;
}

.subtitle {
    font-size: 11px;
    color: #555;
    margin: 0;
    text-transform: uppercase;
}

form {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    padding-left: 15px;
}

input[type="text"] {
    flex: 1;
    padding: 10px;
    background: var(--parchment);
    border: 1px solid var(--border-line);
    font-family: 'Courier Prime', monospace;
    color: var(--ink-dark);
    border-radius: 0;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--british-blue);
    background: #fff;
}

button {
    padding: 10px 15px;
    background-color: var(--british-blue);
    color: white;
    border: none;
    font-family: 'Special Elite', cursive;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: 0;
    transition: background 0.2s;
}

button:hover { 
    background-color: #2b4963; 
}

.list-wrapper {
    max-height: 260px;
    overflow-y: auto;
    margin-bottom: 15px;
    padding-left: 15px;
}

ul { 
    list-style-type: none; 
    padding: 0; 
    margin: 0;
}

li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--parchment);
    padding: 10px 12px;
    margin-bottom: 8px;
    border-left: 4px solid var(--british-blue);
    border-top: 1px solid var(--border-line);
    border-right: 1px solid var(--border-line);
    border-bottom: 1px solid var(--border-line);
    transition: transform 0.1s;
}

li:hover {
    transform: translateX(2px);
}

li span {
    cursor: pointer;
    word-break: break-all;
    padding-right: 10px;
}

li.completed {
    border-left-color: #888;
    background: #e4dfd0;
}

li.completed span {
    text-decoration: line-switch;
    text-decoration: line-through;
    color: #777;
    font-style: italic;
}

.delete-btn {
    background-color: transparent;
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
    padding: 2px 6px;
    font-size: 10px;
    font-family: 'Courier Prime', monospace;
    font-weight: bold;
}

.delete-btn:hover {
    background-color: var(--accent-red);
    color: white;
}

footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px dashed var(--border-line);
    padding-top: 12px;
    padding-left: 15px;
    font-size: 12px;
    color: #555;
}

.clear-btn {
    background: transparent;
    color: #666;
    border: 1px solid #999;
    padding: 4px 8px;
    font-size: 10px;
    font-family: 'Courier Prime', monospace;
}

.clear-btn:hover {
    background: var(--accent-red);
    color: white;
    border-color: var(--accent-red);
}