* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f172a, #1e293b);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: #ffffff;
}

.todo-container {
    width: 100%;
    max-width: 600px;
    background: #111827;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    border: 1px solid #263244;
}

/* HEADER */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.small-title {
    font-size: 11px;
    letter-spacing: 2px;
    color: #60a5fa;
    font-weight: bold;
    margin-bottom: 6px;
}

h1 {
    font-size: 32px;
    margin-bottom: 5px;
}

.subtitle {
    color: #94a3b8;
    font-size: 14px;
}

.task-count {
    width: 65px;
    height: 65px;
    background: #1d4ed8;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.task-count span {
    font-size: 20px;
    font-weight: bold;
}

.task-count small {
    font-size: 10px;
    color: #dbeafe;
}

/* INPUT AREA */

.input-area {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 30px;
}

input {
    width: 100%;
    padding: 14px;
    border: 1px solid #334155;
    border-radius: 10px;
    background: #1e293b;
    color: white;
    outline: none;
    font-size: 14px;
}

input::placeholder {
    color: #64748b;
}

input:focus {
    border-color: #3b82f6;
}

button {
    border: none;
    border-radius: 10px;
    padding: 14px;
    background: #2563eb;
    color: white;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
}

button:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

/* TASK SECTION */

.task-section {
    margin-top: 10px;
}

.section-title {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    color: #e2e8f0;
    font-size: 14px;
    font-weight: bold;
}

#completedCount {
    color: #64748b;
    font-weight: normal;
}

/* TASK */

ul {
    list-style: none;
}

li {
    background: #1e293b;
    border: 1px solid #334155;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: 0.2s;
}

li:hover {
    border-color: #475569;
    transform: translateY(-1px);
}

.task-content {
    flex: 1;
}

.task-text {
    font-size: 15px;
    color: #f8fafc;
    word-break: break-word;
}

.task-date {
    font-size: 11px;
    color: #60a5fa;
    margin-top: 5px;
}

.completed .task-text {
    text-decoration: line-through;
    color: #64748b;
}

/* CHECKBOX */

.check-btn {
    width: 22px;
    height: 22px;
    padding: 0;
    border-radius: 50%;
    background: transparent;
    border: 2px solid #64748b;
    flex-shrink: 0;
}

.check-btn:hover {
    background: #2563eb;
    border-color: #2563eb;
}

/* DELETE BUTTON */

.delete-btn {
    width: auto;
    background: #dc2626;
    padding: 7px 10px;
    font-size: 11px;
}

.delete-btn:hover {
    background: #b91c1c;
}

/* EMPTY MESSAGE */

#emptyMessage {
    text-align: center;
    color: #64748b;
    font-size: 13px;
    padding: 30px 10px;
}

/* MOBILE */

@media (max-width: 500px) {

    .todo-container {
        padding: 20px;
    }

    h1 {
        font-size: 26px;
    }

    .task-count {
        width: 55px;
        height: 55px;
    }

    li {
        padding: 12px;
    }
}