/* ==============================
   GLOBAL STYLES
============================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: "Segoe UI", Arial, sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px 15px;
    color: #333;
}

/* ==============================
   MAIN CONTAINER
============================== */

.container {
    background: #ffffff;
    width: 100%;
    max-width: 750px;
    padding: 40px;
    border-radius: 22px;
    box-shadow: 0 20px 60px rgba(31, 25, 70, 0.22);
}

/* ==============================
   HEADING
============================== */

h1 {
    text-align: center;
    color: #302b63;
    font-size: 32px;
    font-weight: 750;
    margin-bottom: 8px;
    letter-spacing: -0.8px;
}

.subtitle {
    text-align: center;
    color: #888;
    font-size: 14px;
    margin-bottom: 30px;
}

/* ==============================
   INPUT SECTION
============================== */

.task-input {
    display: flex;
    flex-direction: column;
    gap: 17px;
}

.task-entry {
    display: flex;
    gap: 12px;
}

.task-entry input {
    flex: 1;
    min-width: 0;
    padding: 15px;
    border: 1px solid #e2e3ed;
    border-radius: 11px;
    outline: none;
    font-size: 14px;
    transition: 0.3s;
}

.task-entry input:focus,
.date-input input:focus,
.priority-input select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.12);
}

/* General buttons */

button {
    border: none;
    padding: 12px 18px;
    background: #667eea;
    color: white;
    border-radius: 10px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

button:hover {
    opacity: 0.92;
    transform: translateY(-2px);
    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.12);
}

button:active {
    transform: translateY(0);
}

#addTaskBtn {
    white-space: nowrap;
    padding: 14px 22px;
    background: linear-gradient(135deg, #667eea, #764ba2);
}

/* ==============================
   DATE AND PRIORITY INPUTS
============================== */

.date-input,
.priority-input {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #555;
    font-size: 13px;
    font-weight: 600;
}

.date-input input,
.priority-input select {
    padding: 11px 13px;
    border: 1px solid #e2e3ed;
    border-radius: 9px;
    outline: none;
    background: #fff;
    color: #555;
    font-size: 13px;
    transition: 0.3s;
}

.priority-input select {
    cursor: pointer;
}

/* ==============================
   ERROR MESSAGE
============================== */

#errorMessage {
    color: #e74c3c;
    font-size: 13px;
    margin-top: 10px;
}

/* ==============================
   TASK SUMMARY
============================== */

.task-summary {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin: 28px 0 18px;
    color: #666;
    font-size: 14px;
}

.task-summary span {
    background: #f5f5ff;
    padding: 13px 16px;
    border-radius: 10px;
    flex: 1;
}

.task-summary strong {
    color: #667eea;
    font-size: 17px;
    margin-left: 4px;
}

/* ==============================
   PROGRESS SECTION
============================== */

.progress-section {
    margin: 22px 0 28px;
}

.progress-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #444;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 11px;
}

#progressPercentage {
    color: #667eea;
    font-size: 16px;
}

.progress-bar {
    width: 100%;
    height: 11px;
    background: #ededf5;
    border-radius: 20px;
    overflow: hidden;
}

#progressFill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 20px;
    transition: width 0.4s ease;
}

#progressText {
    color: #999;
    font-size: 12px;
    margin-top: 9px;
}

/* ==============================
   FILTER BUTTONS
============================== */

.filter-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 22px;
    padding: 5px;
    background: #f5f5fa;
    border-radius: 12px;
}

.filter-btn {
    background: transparent;
    color: #777;
    flex: 1;
    box-shadow: none;
}

.filter-btn:hover {
    background: #ecebfa;
    color: #555;
    box-shadow: none;
}

.filter-btn.active {
    background: #667eea;
    color: white;
    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.25);
}

/* ==============================
   TASK CARDS
============================== */

#taskList {
    list-style: none;
}

#taskList li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    margin-bottom: 12px;
    background: #fafaff;
    border: 1px solid #eeeeF7;
    border-radius: 12px;
    transition: 0.25s;
}

#taskList li:hover {
    background: #f5f5ff;
    border-color: #dcdafa;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(50, 40, 100, 0.07);
}

#taskList li input[type="checkbox"] {
    width: 17px;
    height: 17px;
    accent-color: #667eea;
    cursor: pointer;
}

.task-text {
    flex: 1;
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: 14px;
    color: #444;
}

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

/* ==============================
   PRIORITY BADGES
============================== */

.priority-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 6px 10px;
    border-radius: 20px;
    white-space: nowrap;
}

.priority-badge.high {
    background: #ffe5e5;
    color: #d63031;
}

.priority-badge.medium {
    background: #fff1d6;
    color: #b7791f;
}

.priority-badge.low {
    background: #dcfce7;
    color: #16803c;
}

/* ==============================
   TASK DATE
============================== */

.task-date {
    color: #888;
    font-size: 11px;
    white-space: nowrap;
}

/* ==============================
   TASK ACTION BUTTONS
============================== */

.task-actions {
    display: flex;
    gap: 7px;
}

.edit-btn {
    background: #f0ad4e;
}

.delete-btn {
    background: #e74c3c;
}

/* ==============================
   EMPTY MESSAGE
============================== */

#emptyMessage {
    text-align: center;
    color: #999;
    font-size: 14px;
    padding: 25px 10px;
}

/* ==============================
   CLEAR COMPLETED BUTTON
============================== */

#clearCompletedBtn {
    background: #fff0f0;
    color: #e74c3c;
    border: 1px solid #ffdada;
    width: 100%;
    margin-top: 15px;
}

#clearCompletedBtn:hover {
    background: #ffe3e3;
    box-shadow: none;
}

/* ==============================
   MOBILE RESPONSIVENESS
============================== */

@media (max-width: 550px) {

    body {
        padding: 15px 10px;
        align-items: flex-start;
    }

    .container {
        padding: 24px 18px;
        border-radius: 16px;
    }

    h1 {
        font-size: 26px;
    }

    .task-entry {
        flex-direction: column;
    }

    .task-entry button {
        width: 100%;
    }

    .date-input,
    .priority-input {
        flex-direction: column;
        align-items: flex-start;
    }

    .date-input input,
    .priority-input select {
        width: 100%;
    }

    .task-summary {
        gap: 8px;
    }

    .task-summary span {
        padding: 11px 8px;
        font-size: 12px;
    }

    .filter-buttons {
        gap: 4px;
    }

    .filter-btn {
        padding: 10px 5px;
        font-size: 12px;
    }

    #taskList li {
        flex-wrap: wrap;
    }

    .task-date {
        white-space: normal;
    }

    .task-actions {
        width: 100%;
    }

    .task-actions button {
        flex: 1;
    }
}

/* Final UI polish */

/* Properly center heading */
.container h1,
.container .subtitle {
    text-align: center;
    width: 100%;
}

/* Better task card spacing */
#taskList li {
    gap: 14px;
    padding: 17px;
    margin-bottom: 13px;
    border-radius: 13px;
}

/* Keep task text readable */
.task-text {
    line-height: 1.5;
}

/* Improve priority badges */
.priority-badge {
    padding: 7px 11px;
    font-size: 11px;
    letter-spacing: 0.2px;
}

/* Better task action spacing */
.task-actions {
    gap: 9px;
    flex-shrink: 0;
}

.task-actions button {
    min-width: 65px;
}

/* Smooth task card hover */
#taskList li {
    transition: transform 0.25s ease,
                box-shadow 0.25s ease,
                background 0.25s ease;
}

#taskList li:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 18px rgba(60, 50, 120, 0.09);
}

/* Small screen improvements */
@media (max-width: 550px) {
    #taskList li {
        gap: 10px;
        padding: 14px;
    }

    .task-text {
        flex-basis: 60%;
    }

    .task-date {
        flex-basis: 100%;
        padding-left: 28px;
    }

    .task-actions {
        width: 100%;
    }

    .task-actions button {
        flex: 1;
    }
}