/* Basic Reset & Global Styles */
:root {
  --bg-color: #121212;
  --surface-color: #1e1e1e;
  --primary-color: #bb86fc;
  --primary-variant-color: #3700b3;
  --secondary-color: #03dac6;
  --on-bg-color: #ffffff;
  --on-surface-color: #e0e0e0;
  --on-primary-color: #000000;
  --error-color: #cf6679;
  --success-color: #03dac6;
  --font-family: 'Roboto', sans-serif;
  --border-radius: 8px;
  --box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

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

html, body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--on-bg-color);
  line-height: 1.6;
}

#root {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 600px;
  margin: 0 auto;
  padding-bottom: 80px; /* Space for nav */
}

svg {
  fill: currentColor;
  width: 24px;
  height: 24px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background-color: var(--surface-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-title {
    font-size: 1.5rem;
    font-weight: 500;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.icon-button {
    background: none;
    border: none;
    color: var(--on-surface-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}


/* Main Content */
.app-container {
    padding: 1.5rem;
    flex-grow: 1;
}

/* Navigation */
.nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--surface-color);
    display: flex;
    justify-content: space-around;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 -2px 5px rgba(0,0,0,0.3);
}

.nav-button {
    background: none;
    border: none;
    color: var(--on-surface-color);
    cursor: pointer;
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.75rem;
    flex-grow: 1;
    transition: color 0.2s ease-in-out, background-color 0.2s ease-in-out;
    opacity: 0.7;
}

.nav-button.active {
    color: var(--primary-color);
    opacity: 1;
}

.nav-button:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-button svg {
    margin-bottom: 4px;
}


/* Project Card */
.project-card {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    box-shadow: var(--box-shadow);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.project-item.dragging {
    opacity: 0.5;
    border: 2px dashed var(--primary-color);
}


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

.project-header h3 {
    font-weight: 500;
    font-size: 1.25rem;
    margin-right: 1rem;
}

.project-header span {
    font-size: 0.9rem;
    color: var(--on-surface-color);
    opacity: 0.7;
    white-space: nowrap;
}

.project-timer {
    font-size: 2.5rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 1.5rem;
    letter-spacing: 2px;
}

.project-item.active .project-timer {
    color: var(--secondary-color);
}

.project-controls {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
}

.control-btn {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, opacity 0.2s;
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.control-btn.start {
    background-color: var(--success-color);
    color: var(--on-primary-color);
}

.control-btn.pause {
    background-color: #ffc107;
    color: var(--on-primary-color);
}

.control-btn.stop {
    background-color: var(--error-color);
    color: var(--on-primary-color);
}
.control-btn.archive {
    background-color: #6c757d;
    color: var(--on-primary-color);
}


/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1rem;
}

.modal-header h2 {
    font-weight: 500;
}

.modal-close-button {
    background: none;
    border: none;
    color: var(--on-surface-color);
    cursor: pointer;
}

/* QR Code Modal */
.qr-code-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
}

.qr-code-canvas {
    border-radius: var(--border-radius);
    background-color: white; /* QR codes need a light background to be scannable */
    padding: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    opacity: 0.8;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-color);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--on-bg-color);
    font-size: 1rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.btn-secondary {
    background-color: #444;
    color: var(--on-surface-color);
}

/* History View */
.log-day-group {
    margin-bottom: 2rem;
}

.log-day-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 1rem;
}

.date-heading {
    font-size: 1.25rem;
    font-weight: 500;
}

.daily-total {
    font-size: 0.9rem;
    opacity: 0.8;
}

.log-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
}

.project-name {
    font-weight: 500;
}

.log-date {
    font-size: 0.9rem;
    opacity: 0.7;
}

.log-duration {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--secondary-color);
}

.history-filters {
    background: var(--surface-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.monthly-summary-container {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: var(--border-radius);
}

.monthly-summary {
    display: flex;
    justify-content: space-between;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.project-breakdown h4 {
    margin-bottom: 0.5rem;
}

.project-breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

/* Settings View */
.archived-project-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    opacity: 0.7;
}

/* Menu */
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1100;
}
.menu-container {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 0.5rem 0;
}
.menu-item {
    display: block;
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--on-surface-color);
    text-align: left;
    cursor: pointer;
}

.menu-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}