body {
    background: var(--bg-main);
    color: var(--text-primary);
}

/* NAV */
nav {
    background: var(--gradient-header);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle);
}

nav h4 {
    font-weight: 600;
    letter-spacing: 0.5px;
}

nav button {
    background: none;
    border: 1px solid var(--border-subtle);
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    cursor: pointer;
}

nav button a {
    text-decoration: none;
    color: var(--text-primary);
}

/* MAIN LAYOUT */
#container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
    min-height: calc(100vh - 70px);
}

/* PANELS */
#left,
#right {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 1.5rem;
    position: relative;
}

/* HEADINGS */
h1 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

/* FORM */
form {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

input[type="text"],
textarea {
    background: transparent;
    border: 1px solid var(--border-subtle);
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    color: var(--text-primary);
    resize: none;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

input[type="checkbox"] {
    accent-color: var(--accent-warning);
}

form div {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

input[type="submit"] {
    margin-top: 0.5rem;
    background: var(--gradient-primary);
    border: none;
    color: white;
    padding: 0.6rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
}

/* TODO LIST */
#todos {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

#todos h2 {
    color: var(--text-muted);
    font-size: 1rem;
    text-align: center;
    margin-top: 2rem;
}

/* TODO CARD */
.todo {
    background: var(--gradient-card-glow);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.todo h4 {
    font-size: 0.95rem;
    font-weight: 500;
}

/* IMPORTANT TAG */
.imp {
    align-self: flex-start;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    background: var(--gradient-success);
    color: #022c22;
    font-weight: 600;
}

.hide {
    display: none;
}

/* BUTTON */
.todo button {
    align-self: flex-end;
    background: transparent;
    border: 1px solid var(--accent-error);
    color: var(--accent-error);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.75rem;
}

.todo button:hover {
    background: var(--accent-error);
    color: white;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    #container {
        grid-template-columns: 1fr;
    }
}