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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f5f7fa;
    min-height: 100vh;
    padding: 20px;
    color: #333;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body.dark-mode-transition {
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Dark Mode Styles */
body.dark-mode {
    background: #1f2937;
    color: #f3f4f6;
}

body.dark-mode header {
    color: #f3f4f6;
}

body.dark-mode .subtitle {
    color: #9ca3af;
}

body.dark-mode .stats-overview,
body.dark-mode .add-goal-section,
body.dark-mode .sort-controls,
body.dark-mode .btn-sound,
body.dark-mode .goal-card,
body.dark-mode .empty-state {
    background: #374151;
    border-color: #4b5563;
}

body.dark-mode #goalInput,
body.dark-mode #sortSelect {
    background: #1f2937;
    color: #f3f4f6;
    border-color: #4b5563;
}

body.dark-mode #goalInput::placeholder {
    color: #6b7280;
}

body.dark-mode .overall-stat,
body.dark-mode .stat-box {
    background: #1f2937;
    border-color: #4b5563;
}

body.dark-mode .stat-box:hover {
    background: #374151;
}

body.dark-mode .overall-stat-value,
body.dark-mode .stat-value {
    color: #f3f4f6;
}

body.dark-mode .overall-stat-label,
body.dark-mode .stat-label {
    color: #9ca3af;
}

body.dark-mode .goal-title {
    color: #f3f4f6;
}

body.dark-mode .btn-reset,
body.dark-mode .btn-delete,
body.dark-mode .btn-pause,
body.dark-mode .btn-notes,
body.dark-mode .btn-color {
    background: #1f2937;
    border-color: #4b5563;
}

/* Button color variations */
body.dark-mode .btn-pause {
    color: #fbbf24;
    border-color: #f59e0b;
}

body.dark-mode .btn-notes,
body.dark-mode .btn-color {
    color: #a78bfa;
    border-color: #8b5cf6;
}

body.dark-mode .btn-reset {
    color: #34d399;
    border-color: #10b981;
}

body.dark-mode .btn-delete {
    color: #f87171;
    border-color: #ef4444;
}

body.dark-mode .btn-pause:hover {
    background: #92400e;
    border-color: #fbbf24;
}

body.dark-mode .btn-notes:hover,
body.dark-mode .btn-color:hover {
    background: #5b21b6;
    border-color: #c4b5fd;
}

body.dark-mode .btn-reset:hover {
    background: #065f46;
    border-color: #6ee7b7;
}

body.dark-mode .btn-delete:hover {
    background: #991b1b;
    border-color: #fca5a5;
}

body.dark-mode .btn-color {
    color: #a78bfa;
    border-color: #8b5cf6;
    background: #1f2937;
}

body.dark-mode .btn-color:hover {
    background: #3730a3;
    border-color: #a78bfa;
}

body.dark-mode .progress-bar {
    background: #4b5563;
}

body.dark-mode .progress-bar-fill {
    background: linear-gradient(90deg, #60a5fa 0%, #a78bfa 100%);
}

body.dark-mode .milestone-text {
    color: #9ca3af;
}

body.dark-mode .best-streak {
    background: #78350f;
    border-color: #92400e;
    color: #fbbf24;
}

body.dark-mode .motivational-message {
    background: #1f2937;
    border-color: #4b5563;
    color: #d1d5db;
}

body.dark-mode .goal-notes {
    background: #1f2937;
    border-left-color: #60a5fa;
}

body.dark-mode .goal-notes textarea {
    background: #374151;
    color: #f3f4f6;
    border-color: #4b5563;
}

body.dark-mode .goal-notes button {
    background: #60a5fa;
    color: #ffffff;
}

body.dark-mode .goal-notes button:hover {
    background: #3b82f6;
}

body.dark-mode .goal-toggle {
    background: #374151;
    border-color: #4b5563;
    color: #f3f4f6;
}

body.dark-mode .goal-toggle:hover {
    background: #4b5563;
    border-color: #6b7280;
}

body.dark-mode .goal-toggle:focus {
    outline-color: #60a5fa;
}

body.dark-mode .goal-toggle.expanded {
    background: #4b5563;
    border-color: #6b7280;
}

body.dark-mode .goal-actions-menu {
    background: #374151;
    border-color: #4b5563;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

body.dark-mode .goal-card.expanded {
    border-radius: 12px;
    padding-right: 184px;
}

body.dark-mode .note-display {
    color: #d1d5db;
}

body.dark-mode .sort-controls label {
    color: #d1d5db;
}

body.dark-mode .empty-state h3 {
    color: #f3f4f6;
}

body.dark-mode .empty-state p {
    color: #9ca3af;
}

body.dark-mode .streak-badge.new {
    background: #1e3a8a;
    color: #93c5fd;
}

body.dark-mode .streak-badge.building {
    background: #78350f;
    color: #fcd34d;
}

body.dark-mode .streak-badge.strong {
    background: #064e3b;
    color: #6ee7b7;
}

body.dark-mode .streak-badge.fire {
    background: #7f1d1d;
    color: #fca5a5;
}

body.dark-mode .color-picker-inline {
    background: #1f2937;
    border-color: #4b5563;
}

body.dark-mode .color-option-inline.selected {
    border-color: #d1d5db;
    box-shadow: 0 0 0 2px #1f2937, 0 0 0 4px #d1d5db;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    padding: 20px;
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.subtitle {
    font-size: 1rem;
    color: #6b7280;
}

.stats-overview {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    margin-bottom: 20px;
    border: 1px solid #e5e7eb;
}

.stats-overview.hidden {
    display: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.overall-stat {
    text-align: center;
    padding: 15px;
    background: #f9fafb;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
}

.overall-stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: #4b5563;
}

.overall-stat-label {
    font-size: 0.8rem;
    color: #9ca3af;
    margin-top: 4px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.add-goal-section {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
    flex-wrap: wrap;
}

#goalInput {
    flex: 1;
    min-width: 200px;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

#goalInput:focus {
    outline: none;
    border-color: #667eea;
}

.color-picker {
    display: flex;
    gap: 8px;
    align-items: center;
}

.color-option {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
    opacity: 0.7;
}

.color-option:hover {
    opacity: 1;
    transform: translateY(-2px);
}

.color-option.selected {
    border-color: #4b5563;
    opacity: 1;
    box-shadow: 0 0 0 2px white, 0 0 0 4px #4b5563;
}

body.dark-mode .color-option {
    opacity: 0.8;
}

body.dark-mode .color-option:hover {
    opacity: 1;
    transform: translateY(-2px);
}

body.dark-mode .color-option.selected {
    border-color: #d1d5db;
    box-shadow: 0 0 0 2px #1f2937, 0 0 0 4px #d1d5db;
}

.controls-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.button-group {
    display: flex;
    gap: 10px;
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    background: white;
    padding: 10px 16px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
}

.sort-controls label {
    font-weight: 600;
    color: #374151;
}

#sortSelect {
    padding: 8px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    background: white;
    transition: border-color 0.3s;
}

#sortSelect:focus {
    outline: none;
    border-color: #667eea;
}

.btn-sound {
    padding: 10px 16px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    color: #cececf;
}

.btn-sound:hover {
    border-color: #9ca3af;
    background: #f9fafb;
}

.btn-sound.muted {
    opacity: 0.5;
}

body.dark-mode .btn-sound:hover {
    border-color: #6b7280;
    background: #374151;
}

.btn-primary {
    padding: 15px 30px;
    background: #4b5563;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn-primary:hover {
    background: #374151;
}

.btn-primary:active {
    transform: scale(0.98);
}

body.dark-mode .btn-primary {
    background: #60a5fa;
}

body.dark-mode .btn-primary:hover {
    background: #3b82f6;
}

.goals-container {
    display: grid;
    gap: 20px;
}

.goal-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    animation: slideIn 0.3s ease-out;
    border-left: 4px solid #667eea;
    border: 1px solid #e5e7eb;
    transition: all 0.2s;
    position: relative;
}

.goal-card.expanded {
    border-radius: 12px 0 0 12px;
    transition: border-radius 0.2s ease, padding-right 0.25s ease;
    padding-right: 184px;
}

.goal-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.goal-card.paused {
    opacity: 0.7;
}

.goal-card.paused::before {
    content: '⏸️ PAUSED';
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.1);
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.75rem;
    font-weight: 600;
}

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

.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.goal-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1f2937;
    display: flex;
    align-items: center;
    gap: 10px;
}

.streak-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

.streak-badge.new {
    background: #dbeafe;
    color: #1e40af;
}

.streak-badge.building {
    background: #fef3c7;
    color: #92400e;
}

.streak-badge.strong {
    background: #d1fae5;
    color: #065f46;
}

.streak-badge.fire {
    background: #fee2e2;
    color: #991b1b;
}

.goal-actions {
    display: flex;
    gap: 10px;
    position: relative;
}

.goal-actions.collapsed {
    display: none;
}

.goal-toggle {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    color: #374151;
    margin-left: auto;
}

.goal-toggle:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

.goal-toggle:hover {
    background: #f9fafb;
    border-color: #d1d5db;
}

.goal-toggle.expanded {
    background: #f3f4f6;
    border-color: #9ca3af;
}

.goal-actions-menu {
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 100%;
    background: white;
    border: 1px solid #e5e7eb;
    border-left: none;
    border-radius: 0 12px 12px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: width 0.25s ease, opacity 0.2s ease, padding 0.25s ease, box-shadow 0.25s ease, border-width 0.25s ease, transform 0.25s ease;
    display: flex;
    flex-direction: column;
    opacity: 0;
    padding: 0;
    pointer-events: none;
    overflow: hidden;
    border-width: 0;
    transform: translateX(20px);
}

.goal-actions-menu.visible {
    width: 160px;
    opacity: 1;
    padding: 16px 12px;
    pointer-events: auto;
    border-width: 1px;
    transform: translateX(0);
}

.goal-actions-menu .goal-actions {
    flex-direction: column;
    gap: 8px;
    margin: 0;
    height: 100%;
    justify-content: center;
}

.goal-actions-menu.visible .goal-actions {
    margin: 0;
}

.goal-actions-menu .btn-reset,
.goal-actions-menu .btn-delete,
.goal-actions-menu .btn-pause,
.goal-actions-menu .btn-notes,
.goal-actions-menu .btn-color {
    width: 100%;
    justify-content: flex-start;
    padding: 10px 12px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.btn-reset, .btn-delete, .btn-pause, .btn-notes, .btn-color {
    padding: 8px 14px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
}

.btn-pause {
    color: #f59e0b;
    border-color: #fcd34d;
}

.btn-pause:hover {
    background: #fffbeb;
    border-color: #f59e0b;
}

.btn-notes {
    color: #8b5cf6;
    border-color: #c4b5fd;
}

.btn-notes:hover {
    background: #f5f3ff;
    border-color: #8b5cf6;
}

.btn-reset {
    color: #10b981;
    border-color: #6ee7b7;
}

.btn-reset:hover {
    background: #ecfdf5;
    border-color: #10b981;
}

.btn-delete {
    color: #ef4444;
    border-color: #fca5a5;
}

.btn-delete:hover {
    background: #fef2f2;
    border-color: #ef4444;
}

.btn-color {
    color: #8b5cf6;
    border-color: #c4b5fd;
}

.btn-color:hover {
    background: #f5f3ff;
    border-color: #8b5cf6;
}

.goal-notes {
    margin-top: 15px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 10px;
    border-left: 3px solid #667eea;
}

.goal-notes textarea {
    width: 100%;
    min-height: 80px;
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    resize: vertical;
    transition: border-color 0.3s;
}

.goal-notes textarea:focus {
    outline: none;
    border-color: #667eea;
}

.goal-notes button {
    margin-top: 8px;
    padding: 8px 16px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.goal-notes button:hover {
    background: #5568d3;
    transform: translateY(-1px);
}

.note-display {
    font-size: 0.9rem;
    color: #555;
    line-height: 1.5;
    font-style: italic;
}

.color-picker-inline {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    padding: 12px;
    background: #f9fafb;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
}

.color-option-inline {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
}

.color-option-inline:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.color-option-inline.selected {
    border-color: #4b5563;
    box-shadow: 0 0 0 2px white, 0 0 0 4px #4b5563;
}

.best-streak {
    text-align: center;
    margin-top: 12px;
    padding: 10px;
    background: #fef3c7;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    color: #92400e;
    border: 1px solid #fde68a;
}

.motivational-message {
    text-align: center;
    margin-top: 12px;
    padding: 10px;
    background: #f3f4f6;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #6b7280;
    font-style: italic;
    border: 1px solid #e5e7eb;
}

.goal-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.stat-box {
    background: #f9fafb;
    padding: 18px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #e5e7eb;
    transition: all 0.2s;
}

.stat-box:hover {
    background: #f3f4f6;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #374151;
    margin-bottom: 6px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
}

.stat-label {
    font-size: 0.8rem;
    color: #9ca3af;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
}

.empty-state.hidden {
    display: none;
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: #374151;
    font-weight: 600;
}

.empty-state p {
    color: #9ca3af;
    font-size: 0.95rem;
}

.progress-bar-container {
    margin-top: 20px;
    margin-bottom: 10px;
}

.progress-bar {
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    background: #6b7280;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.milestone-text {
    text-align: center;
    margin-top: 6px;
    font-size: 0.8rem;
    color: #9ca3af;
    font-weight: 500;
}

.milestone-text.achieved {
    color: #059669;
    font-weight: 600;
}

.celebration {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 5rem;
    animation: celebrate 1s ease-out forwards;
    pointer-events: none;
    z-index: 1000;
    filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.5));
}

body.dark-mode .celebration {
    filter: drop-shadow(0 0 20px rgba(251, 191, 36, 0.7));
}

@keyframes celebrate {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(0);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1) translateY(-100px);
    }
}

@media (max-width: 768px) {
    .goal-card.expanded {
        padding-right: 24px;
    }

    .goal-actions-menu {
        position: static;
        width: 100%;
        height: auto;
        border: none;
        border-radius: 0;
        box-shadow: none;
        margin-top: 15px;
        padding: 0;
        opacity: 1;
        pointer-events: auto;
        border-width: 0;
        transform: none;
    }

    .goal-actions-menu.visible {
        width: 100%;
        padding: 12px 0;
    }

    .goal-actions-menu .goal-actions {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 8px;
        margin: 0;
    }

    .goal-actions-menu .btn-reset,
    .goal-actions-menu .btn-delete,
    .goal-actions-menu .btn-pause,
    .goal-actions-menu .btn-notes,
    .goal-actions-menu .btn-color {
        flex: 1;
        min-width: calc(50% - 4px);
        font-size: 0.8rem;
        padding: 8px 10px;
    }

    .goal-toggle {
        display: none;
    }

    .goal-actions.collapsed {
        display: flex;
    }

    .goal-card.expanded {
        border-radius: 12px;
    }

    .btn-reset, .btn-delete, .btn-pause, .btn-notes, .btn-color {
        font-size: 0.85rem;
        padding: 8px 14px;
    }

    .controls-section {
        justify-content: center;
    }

    .button-group {
        width: 100%;
        justify-content: center;
    }

    .goal-title {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 600px) {
    header h1 {
        font-size: 2rem;
    }

    .add-goal-section {
        flex-direction: column;
    }
    
    .color-picker {
        justify-content: center;
        width: 100%;
    }

    .goal-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .goal-stats {
        grid-template-columns: 1fr 1fr;
    }

    .stat-value {
        font-size: 2rem;
    }
    
    .btn-reset, .btn-delete, .btn-pause, .btn-notes, .btn-color {
        font-size: 0.8rem;
        padding: 8px 12px;
    }
    
    .button-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-sound {
        width: 100%;
    }
}