/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');
@import url("https://cdn.jsdelivr.net/npm/bootstrap-icons@1.13.1/font/bootstrap-icons.min.css");


/* ----------------------- root variable ------------------------- */

:root {
    /* Color Palette */
    --color-bg-dark: #0f0f12;
    --color-bg-panel: #1b1323;
    --color-bg-secondary-panel: #444458;
    --color-bg-coloumn: #2c2c3a;
    --color-bg-surface: #2c2c3a;
    --color-bg-card: #17171b;
    --color-text-main: #ffffff;
    --color-text-muted: rgb(192, 189, 189);
    --color-text-light: rgb(239, 238, 238);
    --color-bg-overlay: rgba(0, 0, 0, 0.721);
    --color-black: #000;
    --color-filter-btn: #1d1d20;

    /* Branding & Interface */
    --color-primary: rgb(100, 100, 222);
    --color-primary-hover: rgb(62, 62, 185);
    --color-secondary-hover: rgb(146, 146, 150);
    --color-danger: rgb(204, 63, 63);
    --color-secondary-danger: rgb(237, 59, 59);
    --color-border: rgb(88, 85, 85);
    --color-header-line: rgb(63, 63, 97);

    /* Priority Accents */
    --color-high: rgb(245, 66, 66);
    --color-high-border: rgb(128, 46, 46);
    --color-medium: rgb(245, 245, 31);
    --color-medium-border: rgb(188, 188, 5);
    --color-low: rgb(0, 216, 0);
    --color-low-border: rgb(6, 117, 6);
    --color-sad-face: rgb(236, 236, 27);

    /* Structural Constants */
    --radius-small: 6px;
    --radius-medium: 8px;
    --radius-large: 12px;
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.25s ease-in-out;

    /* Popup color pallette */
    --color-popup-btn: rgb(230, 63, 133);
    --color-hover-popup-btn: rgb(229, 228, 228);
    --color-secondary-popup-btn: rgb(230, 63, 133);
    --color-hover-secondary-popup-btn: rgb(198, 29, 99);
}

/* ===========================
   Light Theme
   =========================== */

:root.light-theme {

    /* ==========================
       Backgrounds
       ========================== */

    --color-bg-dark: #f6f8fc;
    --color-bg-panel: #edf2f8;
    --color-bg-secondary-panel: #ffffff;
    --color-bg-coloumn: #ffffff;
    --color-bg-surface: #ffffff;
    --color-bg-card: #fcfcfd;

    --color-bg-overlay: rgba(15, 23, 42, .45);

    /* ==========================
       Text
       ========================== */

    --color-text-main: #1f2937;
    --color-text-muted: #6b7280;
    --color-text-light: #4b5563;
    --color-black: #111827;

    /* ==========================
       Borders & UI
       ========================== */

    --color-border: #d3dae6;
    --color-header-line: #d7ddea;
    --color-filter-btn: #f8fafc;
    --color-secondary-hover: #d1d5db;

    /* ==========================
       Brand
       ========================== */

    --color-primary: #5b5ce8;
    --color-primary-hover: #4849d5;

    /* ==========================
       Semantic Colors
       (unchanged)
       ========================== */

    --color-danger: rgb(204, 63, 63);
    --color-secondary-danger: rgb(237, 59, 59);

    --color-high: rgb(245, 66, 66);
    --color-high-border: rgb(128, 46, 46);

    --color-medium: rgb(245, 178, 0);
    --color-medium-border: rgb(196, 140, 0);

    --color-low: rgb(22, 163, 74);
    --color-low-border: rgb(21, 128, 61);

    --color-sad-face: rgb(234, 179, 8);

    /* ==========================
       Popup
       ========================== */

    --color-popup-btn: rgb(230, 63, 133);
    --color-hover-popup-btn: #f3f4f6;
    --color-secondary-popup-btn: rgb(230, 63, 133);
    --color-hover-secondary-popup-btn: rgb(198, 29, 99);
}

:root.light-theme .layout-panel,
:root.light-theme .task-box {
    box-shadow: 0 3px 10px rgba(15, 23, 42, .05);
}

:root.light-theme .form-input {
    border: 1px solid var(--color-border);
    background: white;
}

:root.light-theme .edit-icon {
    background: #f8fafc;
    border-color: #d7ddea;
}

/* ==========================================================================
   2. GLOBAL RESETS & BASE STYLES
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    position: relative;
    font-family: "Ubuntu", sans-serif;
    background-color: var(--color-bg-dark);
    color: var(--color-text-main);
}

/* Global Reusable Buttons */
.btn-global {
    font-size: 1.2rem;
    padding: 5px 15px;
    border-radius: 18px;
    cursor: pointer;
    border: none;
}


/* ==========================================================================
   3. STRUCTURAL PAGE LAYOUT WRAPPERS
   ========================================================================== */
#header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-bottom: 2px solid var(--color-header-line);
}

#main-container {
    background-color: var(--color-bg-panel);
    width: 100%;
    /* min-height: 100vh; */
    padding: 30px;
}

.layout-panel {
    background-color: var(--color-bg-secondary-panel);
    border-radius: var(--radius-small);
    padding: 15px;
    margin: 25px auto;
}

#tasks-container {
    background-color: var(--color-bg-panel);
    display: flex;
    gap: 20px;
    width: 100%;
    padding: 2px;
}

/* edit-popup/aside */
#edit-popup-container {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 60%;
    max-width: 80%;
    border: 2px solid var(--color-text-muted);
    z-index: 1000;
    transition: var(--transition-fast);
}

.popup-heading {
    background-color: var(--color-bg-dark);
    border-radius: 8px;
    text-align: center;
    padding: 6px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#popup-edit-box {
    background-color: var(--color-bg-dark);
}

#popup-edit-form {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 25px;
}

#popup-task-btn-group {
    display: flex;
    padding: 8px;
    gap: 12px;
}

.popup-btn {
    width: 100%;
    color: var(--color-text-main);
    border-radius: 6px;
    padding: 12px 35px;
    transition: var(--transition-normal);
}

#update-task-btn {
    background-color: var(--color-primary);
}

#update-task-btn:hover {
    background-color: var(--color-primary-hover)
}

#cancel-task-btn {
    background-color: var(--color-high);
}

#cancel-task-btn:hover {
    background-color: var(--color-high-border)
}


.popup-icon {
    margin-right: 10px;
}

.layout-column {
    flex: 1;
    padding: 0px 15px;
    background-color: var(--color-bg-surface);
    position: relative;
    border-radius: var(--radius-small);
}

/* Overlay div element */

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--color-bg-overlay);
    z-index: 999;
    transition: var(--transition-normal);
}

/* confirmation popup - clear tasks */
#clear-popup-container {
    display: none;
    max-width: 100%;
    max-height: 100%;
    background-color: var(--color-bg-panel);
    color: var(--color-text-main);
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1002;
    text-align: center;
    border-radius: 25px;
    padding: 30px 0;
}

.clear-popup-text-box {
    padding: 25px;
}

.clear-popup-confirmation-heading {
    font-size: 2.45rem;
}

.clear-popup-confirmation-para {
    padding: 20px 30px;
    font-size: 1.28rem;
    line-height: 1.6;
}

.clear-popup-btn-box {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.clear-popup-btn {
    padding: 12px 55px;
    cursor: pointer;
    font-size: 1.20rem;
    border-radius: 8px;
    font-weight: 800;
    transition: var(--transition-fast);
    border: 2px solid;
}

.clear-popup-btn:active {
    transform: scale(0.95);
}

#cancel-clear-popup-btn {
    border-color: var(--color-text-main);
    background-color: var(--color-text-main);
    color: var(--color-bg-surface);
}

#cancel-clear-popup-btn:hover {
    background-color: var(--color-bg-surface);
    color: var(--color-black);

}

#delete-clear-popup-btn {
    background-color: var(--color-secondary-popup-btn);
    color: var(--color-text-main);
}

#delete-clear-popup-btn:hover {
    background-color: var(--color-hover-secondary-popup-btn);
}

.clear-popup-close-icon {
    background-color: var(--color-bg-coloumn);
    border-radius: 50%;
    padding: 12px 15px;
    position: absolute;
    font-size: 1.30rem;
    font-weight: 200;
    top: 15px;
    right: 15px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.clear-popup-close-icon:hover {
    background-color: var(--color-bg-secondary-panel);
}

/* Column Header Elements */
.task-column-header {
    position: sticky;
    top: 0px;
    z-index: 500;
    background-color: var(--color-bg-coloumn);
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 18px;
    padding: 20px 10px;
}

.task-column-icon {
    font-size: 1.45rem;
    color: var(--color-primary);
}

.task-counter-badge {
    border-radius: 50%;
    background-color: var(--color-primary);
    padding: 3px 8px;
    font-weight: 800;
}

/* ==========================================================================
   4. MODULAR CORE COMPONENTS (Form & Filters)
   ========================================================================== */

/* Header Sub-parts */
.heading-part {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

#logo-img {
    display: inline-block;
    width: 70px;
    margin-right: 10px;
}

#tagline {
    margin-top: 5px;
    color: var(--color-text-muted);
}

.header-btn-part {
    padding: 15px;
    display: flex;
    align-items: center;
}

/* Form Component Elements */
.panel-heading-icon {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-right: 8px;
}

.panel-heading-text {
    display: inline-block;
}

#add-task-box {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 5px 0;
    margin: 15px 0;
}

#add-task-group {
    flex-grow: 0.3;
}

.form-label {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 5px;
}

.labels {
    display: inline-block;
}

.form-input {
    padding: 5px 10px;
    font-size: 1.25rem;
    outline: none;
    border-radius: var(--radius-medium);
    width: 100%;
}

#add-task-btn {
    background-color: var(--color-primary);
    color: var(--color-text-main);
    border-radius: 6px;
    padding: 12px 35px;
    transition: var(--transition-normal);
}

#add-task-btn:hover {
    background-color: var(--color-primary-hover);
}

#add-task-btn:active {
    transform: scale(0.95);
}

.plus-icon {
    margin-left: 8px;
}

/* Filter Controls Wrapper */
#filter-container {
    background-color: var(--color-bg-dark);
}

.filter-btn {
    font-size: 1.15rem;
    padding: 8px 35px;
    border-radius: var(--radius-medium);
    background-color: var(--color-filter-btn);
    color: var(--color-text-main);
    border: 1px solid #858484;
    margin: 5px;
    cursor: pointer;
    transition: var(--transition-normal);
}

.filter-btn:hover {
    background-color: var(--color-primary-hover) !important;
}

.filter-btn--active {
    background-color: var(--color-primary) !important;
}

.filter-btn-icon {
    margin-right: 15px;
}

#priority-flag-icon {
    color: var(--color-secondary-danger);
}

/* ==========================================================================
   5. TASK CARD SUB-COMPONENTS (Row Elements)
   ========================================================================== */
.task-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    height: 70px;
    margin: 15px 0;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-large);
    background-color: var(--color-bg-card);
    overflow: hidden;
    transition: opacity 0.3s ease, padding 0.3s ease;
}

.task-box-first,
.task-box-second {
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: 0;
}

.task-box-first {
    flex: 1;
    max-width: 60%;
}

/* Core fixes applied directly to children elements */
.task-box__checkbox {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.task-box__name {
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
    min-width: 0;
}

.task-box__date {
    display: flex;
}

/* ==========================================================================
   6. INTERACTIVE BADGES, STATE OVERRIDES, & ANIMATIONS
   ========================================================================== */

/* Dynamic State Lists Scroll Settings */
#active-task-container,
#completed-task-container {
    min-height: 200px;
    max-height: 400px;
    overflow-y: auto;
}

#active-all-tasks {
    margin: 15px 0;
}

#completed-all-tasks {
    transition: 0.5s ease-in-out;
}

/* Dynamic Task Delete Button */

.edit-icon {
    cursor: pointer;
    color: var(--color-primary);
    padding: 8px;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    background-color: var(--color-bg-surface);
    transition: var(--transition-fast);
}

.edit-icon:hover {
    background-color: var(--color-bg-dark);
}

.trash-icon {
    color: var(--color-danger);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 10px;
    transition: var(--transition-fast);
}

.trash-icon:hover {
    background-color: var(--color-bg-dark);
    border-radius: 50%;
}

#clear-completed-btn {
    color: var(--color-secondary-danger);
    padding: 10px 18px;
}

#clear-completed-btn:hover {
    background-color: var(--color-text-main) !important;
}

.clear-trash-icon {
    margin-right: 10px;
}

.theme-btn {
    padding: 10px 20px;
    margin: 0;
    border: none;
    border-radius: 8px;
}

/* Dynamic Priority Badges */
.priority-badge {
    position: relative;
    padding: 5px 18px;
    border-radius: 12px;
}

.priority-dot {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.priority-text {
    margin-left: 15px;
}

.high-priority-icon {
    color: var(--color-high);
    border: 1px solid var(--color-high-border);
}

.medium-priority-icon {
    color: var(--color-medium);
    border: 1px solid var(--color-medium-border);
}

.low-priority-icon {
    color: var(--color-low);
    border: 1px solid var(--color-low-border);
}

.high-priority-dot {
    background-color: var(--color-high);
}

.medium-priority-dot {
    background-color: var(--color-medium);
}

.low-priority-dot {
    background-color: var(--color-low);
}

/* Animation Handler */
.task-box.is-disappearing {
    height: 70px;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: 0;
}

/* Empty State / No UI Views */
.no-taskUI {
    display: none;
    justify-content: center;
    align-items: center;
    width: 80%;
    flex-direction: column;
    margin: 2px auto;
    height: 200px;
}

.sad-face {
    color: var(--color-sad-face);
    font-size: 3rem;
}

.no-taskUI-para {
    font-size: 1.3rem;
    padding-top: 20px;
}

/* ==========================================================================
   FOOTER PART
   ========================================================================== */

.footer-container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--color-bg-surface);
    padding: 30px;
    margin-bottom: 0;
    border-radius: 0;
    font-size: 1.20rem;
}

.footer-message-box {
    display: flex;
    gap: 15px;
    color: var(--color-text-muted);
}

.footer-tasks {
    display: flex;
    gap: 25px;
}

.separate-bar {
    width: 2px;
    height: 25px;
    background-color: var(--color-secondary-hover);
}

#activeTasksNumber {
    color: var(--color-primary);
}

#completedTasksNumber {
    color: var(--color-low);
}

#highPriorityTasksNumber {
    color: var(--color-danger);
}

.save-icon {
    color: var(--color-primary);
}

.taskNumber {
    font-weight: 800;
}

.theme-btn-style {
    background-color: var(--color-primary);
}

.theme-btn-box {
    border: 1px solid var(--color-text-main);
    border-radius: 8px;
    padding: 1px;
    margin-right: 15px;
}

/* ------------------------- notification styling ---------------------------- */
#notification-popup-container {
    position: fixed;
    top: 2%;
    right: 2%;
    width: 450px;
    height: 120px;
    z-index: 5000;
    color: #ffffff;
    justify-content: flex-start;
    align-items: center;
    gap: 5%;

    opacity: 0;
    pointer-events: none;
    transform: translateX(120%);
    transition: transform 0.5s ease, opacity 0.5s ease;
}

/* 2. State when notification comes on-screen */
.notification-open-style {
    display: flex !important;
    pointer-events: auto !important;
    animation: show-notification 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

/* 3. State when notification leaves screen */
.notification-close-style {
    display: flex !important;
    pointer-events: none !important;
    animation: close-notification 0.4s ease-in forwards;
}

@keyframes show-notification {
    0% {
        transform: translateX(120%);
        opacity: 0;
    }

    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes close-notification {
    0% {
        transform: translateX(0);
        opacity: 1;
    }

    100% {
        transform: translateX(120%);
        opacity: 0;
    }
}

.notification-edit-style {
    background-color: var(--color-low);
}

.notification-info-style {
    background-color: var(--color-primary);
}

.notification-validation-style {
    background-color: var(--color-medium-border);
}

#notification-close-icon {
    font-size: 0.95rem;
    color: var(--color-text-main);
}

#notification-main-message {
    font-size: 1.5rem;
}

.notification-icon {
    font-size: 3.5rem;
}

.notification-message {
    font-size: 1.35rem;
    padding: 5px 0;
}