/* ===================================
   StudyFlow - Main Styles
   =================================== */

/* CSS Variables */
:root {
    /* Brand Colors */
    --lavender: #d596ff;
    --mint: #8eacff;
    --deep-black: #373737;
    
    /* Neutrals */
    --off-white: #F7F7F7;
    --soft-gray: #E3E3E3;
    --medium-gray: #A1A1A1;
    
    /* Semantic */
    --amber: #FFC857;
    --coral-red: #FF4E4E;
    
    /* Gradients */
    --gradient-pastel: linear-gradient(135deg, #f5f0ff 0%, #e8f4ff 50%, #f0fff4 100%);
    --gradient-lavender: linear-gradient(135deg, #d596ff 0%, #b77bff 100%);
    --gradient-mint: linear-gradient(135deg, #8eacff 0%, #6a8fff 100%);
    
    /* Typography */
    --font-family: 'Comfortaa', cursive;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius: 1rem;
    --radius-sm: 0.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Glass morphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(211, 150, 255, 0.2);
}

/* ===================================
   Reset & Base
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--gradient-pastel);
    color: var(--deep-black);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.45;
    min-height: 100vh;
    overflow-x: hidden;
}

h1 {
    font-size: 32px;
    font-weight: 600;
    line-height: 1.4;
}

h2 {
    font-size: 26px;
    font-weight: 600;
    line-height: 1.35;
}

h3 {
    font-size: 22px;
    font-weight: 500;
    line-height: 1.3;
}

h4 {
    font-size: 18px;
    font-weight: 500;
    line-height: 1.35;
}

p {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.45;
}

button {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    cursor: pointer;
    border: none;
    background: none;
    font-family: var(--font-family);
}

input, textarea, select {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.4;
    font-family: var(--font-family);
}

/* ===================================
   Animations
   =================================== */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(211, 150, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(211, 150, 255, 0.6);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

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

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

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius);
}

.glow-lavender {
    box-shadow: 0 0 20px rgba(211, 150, 255, 0.4);
}

.glow-mint {
    box-shadow: 0 0 20px rgba(142, 172, 255, 0.4);
}

.spring-bounce {
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.spring-bounce:hover {
    transform: scale(1.05);
}

.spring-bounce:active {
    transform: scale(0.95);
}

/* ===================================
   Loading Screen
   =================================== */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--gradient-pastel);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
}

.loading-spinner {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    background: var(--gradient-lavender);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: rotate 2s linear infinite, pulse-glow 2s ease-in-out infinite;
}

.loading-spinner .timer-icon {
    color: white;
}

.loading-text {
    color: var(--deep-black);
}

/* ===================================
   Auth Container
   =================================== */
.auth-container {
    position: fixed;
    inset: 0;
    background: var(--gradient-pastel);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    z-index: 1000;
}

.floating-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.auth-card {
    width: 100%;
    max-width: 450px;
    padding: 2rem;
    animation: fadeIn 0.5s ease-out;
    position: relative;
    z-index: 10;
}

.auth-header {
    margin-bottom: 2rem;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-lavender);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-center:true;
    animation: bounce 3s ease-in-out infinite;
}

.logo-icon svg {
    color: white;
}

.logo-title {
    background: linear-gradient(to right, var(--lavender), var(--mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--medium-gray);
}

.auth-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--glass-border);
}

.auth-tab {
    flex: 1;
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--medium-gray);
    transition: all 0.3s;
    margin-bottom: -2px;
}

.auth-tab.active {
    color: var(--lavender);
    border-bottom-color: var(--lavender);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-field label {
    font-size: 14px;
    font-weight: 500;
    color: var(--deep-black);
}

.form-field input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: white;
    transition: all 0.3s;
}

.form-field input:focus {
    outline: none;
    border-color: var(--lavender);
    box-shadow: 0 0 0 3px rgba(211, 150, 255, 0.1);
}

.auth-button {
    padding: 0.75rem 2rem;
    background: var(--gradient-lavender);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    margin-top: 0.5rem;
    transition: all 0.3s;
}

.auth-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(211, 150, 255, 0.4);
}

.auth-error {
    padding: 0.75rem;
    background: rgba(255, 78, 78, 0.1);
    border: 1px solid var(--coral-red);
    border-radius: var(--radius-sm);
    color: var(--coral-red);
    font-size: 14px;
}

/* ===================================
   Main App Container
   =================================== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

.background-particles {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

/* ===================================
   Header
   =================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 2px solid var(--glass-border);
    animation: slideInFromRight 0.5s ease-out;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-lavender);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce 3s ease-in-out infinite;
}

.brand-icon svg {
    color: white;
}

.brand-title {
    font-size: 24px;
    background: linear-gradient(to right, var(--lavender), var(--mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-subtitle {
    font-size: 12px;
    color: var(--medium-gray);
}

.signout-button {
    padding: 0.5rem 1rem;
    border: 2px solid rgba(211, 150, 255, 0.3);
    border-radius: var(--radius-sm);
    color: var(--deep-black);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    background: transparent;
}

.signout-button:hover {
    border-color: var(--lavender);
    background: rgba(211, 150, 255, 0.1);
}

/* ===================================
   Main Content
   =================================== */
.main-content {
    flex: 1;
    padding: 2rem 1rem;
    position: relative;
    z-index: 10;
}

/* ===================================
   Tabs
   =================================== */
.tabs-container {
    margin-bottom: 2rem;
}

.tabs-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.5rem;
    padding: 0.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tab-trigger {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--deep-black);
    background: transparent;
    transition: all 0.3s;
}

.tab-trigger:hover {
    background: rgba(211, 150, 255, 0.1);
}

.tab-trigger.active {
    background: var(--gradient-lavender);
    color: white;
    box-shadow: var(--shadow-lg);
}

.tab-trigger svg {
    width: 16px;
    height: 16px;
}

.tab-trigger span {
    font-size: 12px;
}

@media (min-width: 768px) {
    .tabs-list {
        grid-template-columns: repeat(9, 1fr);
    }
    
    .tab-trigger {
        flex-direction: row;
        gap: 0.5rem;
    }
    
    .tab-trigger span {
        font-size: 14px;
    }
}

/* ===================================
   Tab Content
   =================================== */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

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

/* ===================================
   Timer
   =================================== */
.timer-container {
    display: flex;
    justify-content: center;
}

.timer-card {
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.timer-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.timer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 10;
}

.icon-button {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(211, 150, 255, 0.1);
    transition: all 0.3s;
}

.icon-button:hover {
    background: rgba(211, 150, 255, 0.2);
}

.timer-mode-buttons {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    position: relative;
    z-index: 10;
}

.mode-button {
    flex: 1;
    padding: 0.5rem 1rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--deep-black);
    font-size: 14px;
    transition: all 0.3s;
}

.mode-button:hover {
    background: rgba(211, 150, 255, 0.1);
}

.mode-button.active {
    background: var(--gradient-lavender);
    color: white;
    border-color: var(--lavender);
}

.timer-display-container {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
    z-index: 10;
}

.timer-display {
    width: 280px;
    height: 280px;
    margin: 0 auto 1.5rem;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.timer-display.work {
    background: linear-gradient(135deg, #9333ea 0%, #7e22ce 100%);
}

.timer-display.shortBreak {
    background: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
}

.timer-display.longBreak {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.timer-glow {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-full);
    opacity: 0;
}

.timer-display.running .timer-glow {
    animation: pulse-glow 2s ease-in-out infinite;
}

.timer-time {
    font-size: 64px;
    color: white;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    position: relative;
    z-index: 10;
}

.celebration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.timer-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(211, 150, 255, 0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.timer-progress-fill {
    height: 100%;
    background: var(--gradient-lavender);
    border-radius: var(--radius-full);
    transition: width 1s linear;
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 10;
}

.timer-control-btn {
    padding: 0.75rem 2rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.timer-control-btn.primary {
    background: var(--gradient-lavender);
    color: white;
    box-shadow: var(--shadow-md);
}

.timer-control-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.timer-control-btn.secondary {
    background: transparent;
    border: 2px solid var(--glass-border);
    color: var(--deep-black);
}

.timer-control-btn.secondary:hover {
    background: rgba(211, 150, 255, 0.1);
    border-color: var(--lavender);
}

.session-count {
    text-align: center;
    color: var(--medium-gray);
    animation: pulse 2s ease-in-out infinite;
    position: relative;
    z-index: 10;
}

.count-value {
    font-weight: 600;
    color: #9333ea;
}

/* ===================================
   Tasks
   =================================== */
.tasks-container {
    max-width: 800px;
    margin: 0 auto;
}

.tasks-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.task-filters {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--deep-black);
    font-size: 14px;
    transition: all 0.3s;
}

.filter-btn:hover {
    background: rgba(211, 150, 255, 0.1);
}

.filter-btn.active {
    background: var(--gradient-lavender);
    color: white;
    border-color: var(--lavender);
}

.add-task-form {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.task-input {
    flex: 1;
    min-width: 200px;
    padding: 0.75rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: white;
    transition: all 0.3s;
}

.task-input:focus {
    outline: none;
    border-color: var(--lavender);
    box-shadow: 0 0 0 3px rgba(211, 150, 255, 0.1);
}

.task-priority-select {
    padding: 0.75rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: white;
    transition: all 0.3s;
}

.task-priority-select:focus {
    outline: none;
    border-color: var(--lavender);
}

.add-task-btn {
    padding: 0.75rem 1.5rem;
    background: var(--gradient-lavender);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.add-task-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.task-item {
    padding: 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s;
    cursor: move;
}

.task-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.task-item.completed {
    opacity: 0.6;
}

.task-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.task-drag-handle {
    color: var(--medium-gray);
    cursor: move;
}

.task-content {
    flex: 1;
}

.task-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.task-item.completed .task-title {
    text-decoration: line-through;
}

.task-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.task-badge {
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
}

.task-badge.urgent {
    background: var(--coral-red);
    color: white;
}

.task-badge.high {
    background: var(--amber);
    color: var(--deep-black);
}

.task-badge.medium {
    background: var(--mint);
    color: white;
}

.task-badge.low {
    background: var(--soft-gray);
    color: var(--deep-black);
}

.task-delete {
    padding: 0.5rem;
    color: var(--coral-red);
    transition: all 0.3s;
}

.task-delete:hover {
    transform: scale(1.1);
}

/* ===================================
   Notes
   =================================== */
.notes-container {
    max-width: 1200px;
    margin: 0 auto;
}

.notes-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.add-note-btn {
    padding: 0.75rem 1.5rem;
    background: var(--gradient-lavender);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.add-note-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.note-card {
    padding: 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    transition: all 0.3s;
    animation: fadeIn 0.3s ease-out;
}

.note-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.note-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.note-color {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: transform 0.3s;
}

.note-color:hover {
    transform: scale(1.2);
}

.note-delete {
    color: var(--coral-red);
    padding: 0.25rem;
    transition: transform 0.3s;
}

.note-delete:hover {
    transform: scale(1.2);
}

.note-title {
    font-weight: 600;
    margin-bottom: 0.75rem;
    border: none;
    background: transparent;
    width: 100%;
    resize: none;
    font-size: 18px;
}

.note-title:focus {
    outline: none;
}

.note-content {
    color: var(--medium-gray);
    border: none;
    background: transparent;
    width: 100%;
    resize: vertical;
    min-height: 80px;
}

.note-content:focus {
    outline: none;
}

.note-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.75rem;
}

.note-tag {
    padding: 0.25rem 0.5rem;
    background: rgba(211, 150, 255, 0.2);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--deep-black);
}

/* ===================================
   Calendar
   =================================== */
.calendar-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.calendar-nav-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(211, 150, 255, 0.1);
    transition: all 0.3s;
}

.calendar-nav-btn:hover {
    background: rgba(211, 150, 255, 0.2);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.calendar-day-header {
    padding: 0.75rem;
    text-align: center;
    font-weight: 600;
    color: var(--medium-gray);
    font-size: 14px;
}

.calendar-day {
    aspect-ratio: 1;
    padding: 0.5rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.calendar-day:hover {
    background: rgba(211, 150, 255, 0.1);
    transform: scale(1.05);
}

.calendar-day.other-month {
    opacity: 0.3;
}

.calendar-day.today {
    background: var(--gradient-lavender);
    color: white;
    font-weight: 600;
}

.calendar-day-number {
    font-size: 14px;
    font-weight: 500;
}

.calendar-day-dots {
    display: flex;
    gap: 2px;
    margin-top: 4px;
}

.calendar-dot {
    width: 4px;
    height: 4px;
    border-radius: var(--radius-full);
}

.calendar-dot.study-session {
    background: var(--lavender);
}

.calendar-dot.task-due {
    background: var(--coral-red);
}

.calendar-legend {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 14px;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
}

/* ===================================
   Resources
   =================================== */
.resources-container {
    max-width: 900px;
    margin: 0 auto;
}

.resources-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.add-resource-btn {
    padding: 0.75rem 1.5rem;
    background: var(--gradient-lavender);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.add-resource-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.resources-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.resource-item {
    padding: 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    transition: all 0.3s;
}

.resource-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.resource-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.5rem;
}

.resource-title {
    font-weight: 600;
    font-size: 18px;
}

.resource-url {
    color: var(--mint);
    font-size: 14px;
    text-decoration: none;
}

.resource-url:hover {
    text-decoration: underline;
}

.resource-description {
    color: var(--medium-gray);
    margin-top: 0.5rem;
}

.resource-delete {
    color: var(--coral-red);
    padding: 0.25rem;
    transition: transform 0.3s;
}

.resource-delete:hover {
    transform: scale(1.2);
}

/* ===================================
   Dashboard
   =================================== */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
}

.dashboard-container > h2 {
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: fadeIn 0.3s ease-out;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon.lavender {
    background: var(--gradient-lavender);
    color: white;
}

.stat-icon.mint {
    background: var(--gradient-mint);
    color: white;
}

.stat-icon.amber {
    background: linear-gradient(135deg, var(--amber) 0%, #f59e0b 100%);
    color: white;
}

.stat-icon.coral {
    background: linear-gradient(135deg, var(--coral-red) 0%, #dc2626 100%);
    color: white;
}

.stat-content {
    flex: 1;
}

.stat-label {
    color: var(--medium-gray);
    font-size: 14px;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 28px;
    font-weight: 600;
    color: var(--deep-black);
}

.chart-container {
    padding: 2rem;
    animation: fadeIn 0.5s ease-out;
}

.chart-container h3 {
    margin-bottom: 1.5rem;
}

/* ===================================
   Leaderboard
   =================================== */
.leaderboard-container {
    max-width: 700px;
    margin: 0 auto;
}

.leaderboard-header {
    text-align: center;
    margin-bottom: 2rem;
}

.leaderboard-subtitle {
    color: var(--medium-gray);
    margin-top: 0.5rem;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.leaderboard-item {
    padding: 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s;
    animation: fadeIn 0.3s ease-out;
}

.leaderboard-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.leaderboard-item.top-3 {
    background: linear-gradient(135deg, rgba(211, 150, 255, 0.1) 0%, rgba(142, 172, 255, 0.1) 100%);
    border-color: var(--lavender);
}

.leaderboard-rank {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gradient-lavender);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.leaderboard-item.top-3 .leaderboard-rank {
    background: linear-gradient(135deg, #ffd700 0%, #ffa500 100%);
    color: white;
}

.leaderboard-info {
    flex: 1;
}

.leaderboard-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.leaderboard-stats {
    font-size: 14px;
    color: var(--medium-gray);
}

.leaderboard-score {
    font-size: 20px;
    font-weight: 600;
    color: var(--lavender);
}

/* ===================================
   Website Blocker
   =================================== */
.blocker-container {
    max-width: 700px;
    margin: 0 auto;
}

.blocker-card {
    padding: 2rem;
}

.blocker-description {
    color: var(--medium-gray);
    margin: 1rem 0 2rem;
}

.add-site-form {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.blocked-site-input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: white;
    transition: all 0.3s;
}

.blocked-site-input:focus {
    outline: none;
    border-color: var(--lavender);
    box-shadow: 0 0 0 3px rgba(211, 150, 255, 0.1);
}

.add-blocked-site-btn {
    padding: 0.75rem 1.5rem;
    background: var(--gradient-lavender);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.add-blocked-site-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.blocked-sites-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.blocked-site-item {
    padding: 1rem;
    background: white;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s;
}

.blocked-site-item:hover {
    border-color: var(--lavender);
}

.blocked-site-url {
    font-weight: 500;
}

.unblock-btn {
    padding: 0.5rem 1rem;
    background: var(--coral-red);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: all 0.3s;
}

.unblock-btn:hover {
    transform: scale(1.05);
}

/* ===================================
   Music Player
   =================================== */
.music-container {
    max-width: 700px;
    margin: 0 auto;
}

.music-card {
    padding: 2rem;
}

.music-description {
    color: var(--medium-gray);
    margin: 1rem 0 2rem;
}

.music-playlists {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.playlist-item {
    padding: 1.5rem;
    background: white;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.playlist-item:hover {
    border-color: var(--lavender);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.playlist-icon {
    font-size: 48px;
    margin-bottom: 0.75rem;
}

.playlist-info h4 {
    margin-bottom: 0.5rem;
}

.playlist-info p {
    font-size: 14px;
    color: var(--medium-gray);
}

.music-note {
    padding: 1rem;
    background: rgba(211, 150, 255, 0.1);
    border-radius: var(--radius-sm);
    text-align: center;
    color: var(--deep-black);
    font-size: 14px;
}

/* ===================================
   Study Coach
   =================================== */
.study-coach {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 400px;
    max-width: calc(100vw - 3rem);
    z-index: 100;
    animation: slideInFromRight 0.5s ease-out;
}

.coach-card {
    padding: 1.5rem;
    border: 2px solid rgba(211, 150, 255, 0.3);
    box-shadow: var(--shadow-xl);
}

.coach-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.coach-avatar {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: var(--gradient-lavender);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce 3s ease-in-out infinite;
}

.coach-avatar svg {
    color: white;
}

.close-coach {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: rgba(211, 150, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--deep-black);
    transition: all 0.3s;
}

.close-coach:hover {
    background: rgba(211, 150, 255, 0.2);
    transform: scale(1.1);
}

.coach-content h3 {
    margin-bottom: 0.75rem;
}

.coach-message {
    color: var(--medium-gray);
    line-height: 1.6;
}

.coach-achievements {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--glass-border);
}

.coach-achievements h4 {
    margin-bottom: 1rem;
}

.achievement-item {
    margin-bottom: 0.75rem;
}

.achievement-progress {
    width: 100%;
    height: 8px;
    background: rgba(211, 150, 255, 0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.achievement-bar {
    height: 100%;
    background: var(--gradient-lavender);
    border-radius: var(--radius-full);
    transition: width 0.5s ease-out;
}

.achievement-label {
    font-size: 12px;
    color: var(--medium-gray);
}

.show-coach-btn {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: var(--gradient-lavender);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    z-index: 100;
    animation: bounce 3s ease-in-out infinite;
}

/* ===================================
   Footer
   =================================== */
.footer {
    margin-top: 4rem;
    border-top: 2px solid var(--glass-border);
    position: relative;
    z-index: 10;
}

.footer-content {
    padding: 1.5rem 1rem;
    text-align: center;
}

.footer-text {
    font-size: 14px;
    color: var(--medium-gray);
}

.footer-heart {
    color: var(--lavender);
}

.footer-copyright {
    font-size: 12px;
    color: var(--medium-gray);
    margin-top: 0.5rem;
}

/* ===================================
   Modal
   =================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
    animation: fadeIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.close-modal {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: rgba(211, 150, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--deep-black);
    transition: all 0.3s;
}

.close-modal:hover {
    background: rgba(211, 150, 255, 0.2);
    transform: scale(1.1);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-group label {
    font-weight: 500;
    font-size: 14px;
}

.setting-input {
    padding: 0.75rem;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: white;
    transition: all 0.3s;
}

.setting-input:focus {
    outline: none;
    border-color: var(--lavender);
    box-shadow: 0 0 0 3px rgba(211, 150, 255, 0.1);
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.setting-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
}

.save-settings-btn {
    padding: 0.75rem 2rem;
    background: var(--gradient-lavender);
    color: white;
    border-radius: var(--radius-sm);
    transition: all 0.3s;
}

.save-settings-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   Toast
   =================================== */
.toast-container {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    padding: 1rem 1.5rem;
    background: white;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    animation: slideInFromRight 0.3s ease-out;
    pointer-events: auto;
}

.toast.success {
    border-color: #16a34a;
}

.toast.error {
    border-color: var(--coral-red);
}

.toast-icon {
    font-size: 20px;
}

.toast-message {
    flex: 1;
    font-size: 14px;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .tabs-list {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .timer-display {
        width: 220px;
        height: 220px;
    }
    
    .timer-time {
        font-size: 48px;
    }
    
    .timer-controls {
        flex-direction: column;
    }
    
    .timer-control-btn {
        width: 100%;
    }
    
    .add-task-form {
        flex-direction: column;
    }
    
    .task-input {
        min-width: 100%;
    }
    
    .notes-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .music-playlists {
        grid-template-columns: 1fr;
    }
    
    .study-coach {
        width: calc(100vw - 2rem);
        bottom: 1rem;
        right: 1rem;
    }
    
    .show-coach-btn {
        width: 56px;
        height: 56px;
        bottom: 1rem;
        right: 1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 20px;
    }
    
    h3 {
        font-size: 18px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .brand-title {
        font-size: 20px;
    }
    
    .task-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .calendar-grid {
        gap: 0.25rem;
    }
    
    .calendar-day {
        padding: 0.25rem;
    }
    
    .calendar-day-number {
        font-size: 12px;
    }
}