/* ==========================================================================
   DESIGN SYSTEM & THEME VARIABLES
   ========================================================================== */

:root {
    /* DEFAULT THEME: Deep Space (Premium Dark Tech) */
    --bg-primary: #08090f;
    --bg-secondary: #0f101a;
    --bg-tertiary: #171826;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #8b5cf6; /* Indigo/Violet */
    --accent-primary-rgb: 139, 92, 246;
    --accent-secondary: #06b6d4; /* Cyan */
    --accent-secondary-rgb: 6, 182, 212;
    --accent-success: #10b981; /* Emerald */
    --border-color: rgba(255, 255, 255, 0.06);
    --card-hover-border: rgba(139, 92, 246, 0.3);
    
    --glass-bg: rgba(15, 16, 26, 0.7);
    --glass-border: rgba(255, 255, 255, 0.04);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.15);
}

[data-theme="nordic-clean"] {
    /* LIGHT THEME: Clean Nordic Design */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent-primary: #3b82f6; /* Soft Blue */
    --accent-primary-rgb: 59, 130, 246;
    --accent-secondary: #0d9488; /* Teal */
    --accent-secondary-rgb: 13, 148, 136;
    --accent-success: #10b981;
    --border-color: rgba(0, 0, 0, 0.08);
    --card-hover-border: rgba(59, 130, 246, 0.4);
    
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.04);
    --glass-shadow: 0 8px 32px 0 rgba(15, 23, 42, 0.05);
    
    --shadow-glow: 0 4px 20px rgba(59, 130, 246, 0.08);
}

[data-theme="cyberpunk"] {
    /* NEON THEME: High Contrast Cyberpunk */
    --bg-primary: #0a0512;
    --bg-secondary: #120a1f;
    --bg-tertiary: #1d0f30;
    --text-primary: #00f0ff; /* Electric Cyan */
    --text-secondary: #e0007a; /* Neon Magenta */
    --text-muted: #8e80a9;
    --accent-primary: #ff007f; /* Cyber Pink */
    --accent-primary-rgb: 255, 0, 127;
    --accent-secondary: #00f0ff; /* Cyber Cyan */
    --accent-secondary-rgb: 0, 240, 255;
    --accent-success: #39ff14; /* Neon Green */
    --border-color: rgba(255, 0, 127, 0.2);
    --card-hover-border: rgba(0, 240, 255, 0.6);
    
    --glass-bg: rgba(18, 10, 31, 0.85);
    --glass-border: rgba(255, 0, 127, 0.15);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    
    --shadow-glow: 0 0 25px rgba(255, 0, 127, 0.35);
}

/* ==========================================================================
   RESET & GLOBAL BASICS
   ========================================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) var(--bg-primary);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    border: none;
    background: none;
    outline: none;
}

button {
    cursor: pointer;
}

a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

a:hover {
    opacity: 0.8;
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

/* Confetti Overlay */
#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    pointer-events: none;
}

/* ==========================================================================
   LAYOUT STRUCTURE
   ========================================================================== */

.app-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
    position: relative;
}

/* Sidebar Navigation */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    z-index: 10;
}

.sidebar-header {
    margin-bottom: 2.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.logo-icon {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 1.75rem;
    display: inline-block;
    animation: float 4s ease-in-out infinite;
}

.logo-text {
    color: var(--text-primary);
}

.accent-text {
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-header .subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-top: 0.25rem;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    border-radius: 12px;
    text-align: left;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
}

.nav-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-btn.active {
    background: linear-gradient(135deg, rgba(var(--accent-primary-rgb), 0.15), rgba(var(--accent-secondary-rgb), 0.05));
    color: var(--text-primary);
    border-left: 3px solid var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.nav-icon {
    width: 20px;
    height: 20px;
}

.badge {
    position: absolute;
    right: 1.25rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: none; /* Shown dynamically when timer is running */
}

/* Sidebar progress card */
.sidebar-progress-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.progress-bar-container {
    height: 6px;
    background-color: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    width: 0%;
    transition: width var(--transition-slow);
}

.progress-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Sidebar settings & theme */
.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.theme-selector-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
}

.theme-dropdown {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.8rem;
}

.theme-dropdown:hover {
    border-color: var(--accent-primary);
}

.developer-credit {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
}

/* ==========================================================================
   MAIN PANEL
   ========================================================================== */

.main-panel {
    padding: 2rem 3rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    height: 100vh;
}

/* Top Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

#view-title {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(120deg, var(--text-primary) 60%, var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-muted {
    color: var(--text-muted);
}

.quick-status {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.quick-stat {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.quick-stat .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.quick-stat .value {
    font-weight: 700;
    color: var(--text-primary);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    box-shadow: var(--shadow-glow);
    transition: transform var(--transition-fast), filter var(--transition-fast);
}

.btn-primary:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    font-weight: 500;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #f87171;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    font-weight: 500;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
}

/* Content wrapper and animation views */
.content-wrapper {
    position: relative;
    flex-grow: 1;
}

.tab-view {
    display: none;
    animation: slideUpFade var(--transition-normal) forwards;
}

.tab-view.active-view {
    display: block;
}

/* ==========================================================================
   VIEW 1: ROADMAP TIMELINE
   ========================================================================== */

.filters-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.75rem;
}

.filter-buttons {
    display: flex;
    background-color: var(--bg-secondary);
    padding: 0.3rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.filter-btn.active {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.roadmap-summary-pills {
    display: flex;
    gap: 0.75rem;
}

.summary-pill {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Weeks Stack */
.weeks-timeline {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Week Accordion Card */
.week-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.week-card:hover {
    border-color: var(--card-hover-border);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.5);
}

.week-card.week-completed {
    border-color: var(--accent-success);
}

/* Accordion Header */
.week-header {
    padding: 1.5rem 2rem;
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 2rem;
    cursor: pointer;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.01), transparent);
    user-select: none;
}

.week-badge {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    padding: 0.4rem 0.8rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.week-header-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.week-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.week-problem-solved {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.week-progress-circle {
    position: relative;
    width: 44px;
    height: 44px;
}

.week-progress-svg {
    transform: rotate(-90deg);
}

.week-circle-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 3;
}

.week-circle-fill {
    fill: none;
    stroke: var(--accent-success);
    stroke-width: 3;
    stroke-dasharray: 125.6;
    stroke-dashoffset: 125.6; /* 2 * PI * r (r=20) = 125.6 */
    transition: stroke-dashoffset var(--transition-normal);
}

.week-progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-primary);
}

.accordion-arrow {
    width: 24px;
    height: 24px;
    color: var(--text-muted);
    transition: transform var(--transition-normal);
}

.week-card.expanded .accordion-arrow {
    transform: rotate(180deg);
    color: var(--text-primary);
}

/* Accordion Body */
.week-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal) ease-out;
    border-top: 0 solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.005);
}

.week-card.expanded .week-body {
    max-height: 2000px; /* High enough to contain all content */
    border-top-width: 1px;
}

.week-body-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Course Link Section */
.course-info-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.5rem;
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.course-tag {
    background-color: rgba(139, 92, 246, 0.15);
    color: var(--accent-primary);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

.link-btn:hover {
    border-color: var(--accent-secondary);
}

/* Task Checklists */
.tasks-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.task-item-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.task-item-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

.task-item-card.task-completed {
    border-color: rgba(16, 185, 129, 0.25);
    background-color: rgba(16, 185, 129, 0.01);
}

.task-main-row {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

/* Checkbox styling */
.custom-checkbox-container {
    position: relative;
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.custom-checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 24px;
    width: 24px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    background-color: transparent;
    transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.custom-checkbox-container:hover input ~ .checkmark {
    border-color: var(--accent-primary);
    transform: scale(1.1);
}

.custom-checkbox-container input:checked ~ .checkmark {
    background-color: var(--accent-success);
    border-color: var(--accent-success);
    transform: scale(1.0);
    animation: popCheck 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.checkmark::after {
    content: "";
    position: absolute;
    display: none;
}

.custom-checkbox-container input:checked ~ .checkmark::after {
    display: block;
}

.custom-checkbox-container .checkmark::after {
    left: 8px;
    top: 4px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.task-text-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex-grow: 1;
}

.task-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task-type {
    font-size: 1.05rem;
    font-weight: 600;
}

.task-hours-badge {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

.task-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-top: 0.5rem;
}

/* Focus and Notes controls within roadmap tasks */
.task-footer-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
    margin-top: auto;
}

.btn-task-action {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.btn-task-action:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background-color: var(--bg-tertiary);
}

.btn-task-action.active-focus-task {
    color: var(--accent-secondary);
    border-color: var(--accent-secondary);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.15);
}

/* User notes text area inside cards */
.notes-expander {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
    animation: slideDown 0.25s ease forwards;
}

.notes-expander.visible {
    display: flex;
}

.notes-textarea {
    width: 100%;
    min-height: 80px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.6rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    resize: vertical;
}

.notes-textarea:focus {
    border-color: var(--accent-primary);
}

/* Custom Sandboxed Sub-tasks Inside Week */
.sandbox-subtasks {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.sandbox-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.sandbox-title-row h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.custom-subtask-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.custom-subtask-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    animation: slideInLeft 0.3s ease-out forwards;
}

.custom-subtask-item.subtask-completed {
    border-color: rgba(16, 185, 129, 0.15);
    opacity: 0.7;
}

.subtask-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.subtask-text-span {
    font-size: 0.85rem;
}

.subtask-left input:checked ~ .subtask-text-span {
    text-decoration: line-through;
    color: var(--text-muted);
}

.btn-delete-subtask {
    color: var(--text-muted);
    font-size: 1.1rem;
    padding: 0.2rem;
    border-radius: 4px;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.btn-delete-subtask:hover {
    color: #f87171;
    background-color: rgba(239, 68, 68, 0.1);
}

/* Add custom subtask form */
.add-subtask-form {
    display: flex;
    gap: 0.75rem;
}

.add-subtask-input {
    flex-grow: 1;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
}

.add-subtask-input:focus {
    border-color: var(--accent-primary);
}

.btn-add-subtask {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.btn-add-subtask:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
}

/* ==========================================================================
   VIEW 2: FOCUS STUDIO
   ========================================================================== */

.focus-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.focus-card {
    border-radius: 24px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

/* Glassmorphism base */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.card-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* Main Timer styling */
.main-timer-card {
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    border-color: var(--border-color);
}

.focus-task-indicator {
    text-align: center;
    width: 100%;
}

.focus-task-indicator .tag {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-secondary);
    background-color: rgba(6, 182, 212, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.focus-task-indicator h3 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

/* Circle Clock styling */
.timer-display-container {
    position: relative;
    width: 260px;
    height: 260px;
}

.timer-progress-ring {
    width: 100%;
    height: 100%;
}

.timer-ring-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 6;
}

.timer-ring-fill {
    fill: none;
    stroke: url(#timer-gradient); /* Will declare dynamically or via CSS */
    stroke: var(--accent-primary);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565.48; /* 2 * PI * r (r=90) */
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 0.1s linear;
}

.timer-text-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.timer-numbers {
    font-family: var(--font-mono);
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    color: var(--text-primary);
}

.timer-status {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 0.25rem;
}

/* Timer Buttons */
.timer-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.btn-timer-primary {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.4);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.btn-timer-primary:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 30px -5px rgba(139, 92, 246, 0.5);
    filter: brightness(1.1);
}

.btn-timer-primary:active {
    transform: scale(0.96);
}

.btn-timer-secondary {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.btn-timer-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.timer-presets {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.preset-btn {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.preset-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.preset-btn.active {
    background-color: var(--bg-primary);
    color: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

/* Sound Mixer sidebar panel */
.focus-side-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sound-mixer-card {
    border-color: var(--border-color);
}

.sound-mixer-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.sound-toggle-btn {
    flex-grow: 0;
    flex-shrink: 0;
    width: 120px;
    text-align: left;
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.sound-toggle-btn.playing {
    background: linear-gradient(135deg, rgba(var(--accent-secondary-rgb), 0.15), rgba(var(--accent-primary-rgb), 0.05));
    border-color: var(--accent-secondary);
    color: var(--text-primary);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.1);
}

.sound-slider {
    flex-grow: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background-color: var(--bg-tertiary);
    outline: none;
}

.sound-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-secondary);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.sound-slider::-webkit-slider-thumb:hover {
    transform: scale(1.3);
}

.sound-actions {
    margin-top: 1rem;
    display: flex;
    justify-content: flex-end;
}

/* Guided breathing panel */
.breathing-card {
    border-color: var(--border-color);
    align-items: center;
}

.breathing-space {
    position: relative;
    width: 150px;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 1.5rem 0;
}

.breathing-ring {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--accent-primary-rgb), 0.4) 0%, rgba(var(--accent-secondary-rgb), 0.1) 70%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.2);
    transition: transform 3.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.breathing-ring.inhale {
    transform: scale(2.2);
    background: radial-gradient(circle, rgba(var(--accent-secondary-rgb), 0.5) 0%, rgba(var(--accent-primary-rgb), 0.15) 75%);
    box-shadow: 0 0 50px rgba(6, 182, 212, 0.4);
}

.breathing-ring.exhale {
    transform: scale(0.8);
    background: radial-gradient(circle, rgba(var(--accent-primary-rgb), 0.3) 0%, rgba(var(--accent-secondary-rgb), 0.05) 70%);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.15);
}

.breathing-text {
    position: absolute;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    pointer-events: none;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.breathing-controls {
    width: 100%;
    display: flex;
    justify-content: center;
}

/* Inspiration banner */
.focus-inspiration-banner {
    border-radius: 20px;
    padding: 1.5rem 2.5rem;
    border-color: var(--border-color);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    position: relative;
    overflow: hidden;
}

.quote-symbol {
    font-size: 4rem;
    font-family: serif;
    line-height: 1;
    color: var(--accent-primary);
    opacity: 0.25;
    position: absolute;
    left: 1rem;
    top: -0.5rem;
}

.quote-text {
    font-size: 1.05rem;
    font-style: italic;
    line-height: 1.5;
    z-index: 1;
    padding-left: 1.5rem;
    flex-grow: 1;
}

.quote-author {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-secondary);
    white-space: nowrap;
}

/* ==========================================================================
   VIEW 3: STATS DASHBOARD
   ========================================================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    border-radius: 20px;
    padding: 1.5rem;
    border-color: var(--border-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 2.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
}

.stat-subtext {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-details-row {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2rem;
}

.stats-large-card {
    border-radius: 24px;
    padding: 2rem;
    border-color: var(--border-color);
}

.stats-large-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
}

.completed-tasks-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.empty-log-state {
    text-align: center;
    padding: 3rem 0;
}

.log-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1.25rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.85rem;
    animation: slideInLeft 0.3s ease-out forwards;
}

.log-item-details {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.log-item-title {
    font-weight: 600;
}

.log-item-week {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.log-item-time {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-success);
    background-color: rgba(16, 185, 129, 0.08);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
}

/* Workspace settings card details */
.settings-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-box {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.control-box h4 {
    font-size: 0.95rem;
    font-weight: 600;
}

.control-box .small {
    font-size: 0.75rem;
    line-height: 1.4;
}

.control-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.25rem;
}

.insights-list {
    padding-left: 1.25rem;
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    line-height: 1.4;
}

.insights-list li::marker {
    color: var(--accent-secondary);
}

/* ==========================================================================
   TOAST NOTIFICATION SYSTEM
   ========================================================================== */

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 10000;
    pointer-events: none;
}

.toast {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-primary);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 280px;
    max-width: 400px;
    pointer-events: auto;
    animation: toastIn 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards,
               toastOut 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275) 4.65s forwards;
}

.toast.toast-success {
    border-left-color: var(--accent-success);
}

.toast.toast-info {
    border-left-color: var(--accent-secondary);
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */

@keyframes float {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-5px) rotate(3deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes popCheck {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1.0); }
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
}

.pulse {
    animation: badgePulse 2s infinite;
}

@keyframes badgePulse {
    0% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.7); }
    70% { box-shadow: 0 0 0 8px rgba(6, 182, 212, 0); }
    100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */

@media (max-width: 1200px) {
    .focus-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-details-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .app-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        height: auto;
        position: relative;
        padding: 1.5rem;
    }
    
    .sidebar-progress-card {
        display: none; /* Hide progress card in mobile sidebar since header handles it */
    }
    
    .main-panel {
        padding: 1.5rem;
        height: auto;
        overflow-y: visible;
    }
    
    .top-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .quick-status {
        width: 100%;
        justify-content: space-between;
    }
    
    .tasks-grid {
        grid-template-columns: 1fr;
    }
}