:root {
    --bg-color: #f7fafc;
    --text-color: #2d3748;
    --card-bg: #ffffff;
    --primary-color: #3b82f6;
    --primary-color-light: #dbeafe;
    --secondary-color: #718096;
    --border-color: #e2e8f0;
    --shadow-color-soft: rgba(0, 0, 0, 0.05);
    --nav-bg: #ffffff;
    --nav-icon-color: #a0aec0;
    --nav-icon-active: #3b82f6;
    --success-color: #38a169;
    --warning-color: #dd6b20;
    --error-color: #e53e3e;
}

[data-theme="dark"] {
    --bg-color: #1a202c;
    --text-color: #e2e8f0;
    --card-bg: #2d3748;
    --primary-color: #60a5fa;
    --primary-color-light: #4a5568;
    --secondary-color: #a0aec0;
    --border-color: #4a5568;
    --shadow-color-soft: rgba(0, 0, 0, 0.2);
    --nav-bg: #2d3748;
    --nav-icon-color: #a0aec0;
    --nav-icon-active: #60a5fa;
    --success-color: #68d391;
    --warning-color: #f6ad55;
    --error-color: #fc8181;
}

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

html, body {
    height: 100%;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
}

#app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
}

#app-body {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding-bottom: 70px; /* Space for bottom nav */
}

.view {
    display: none;
    flex-direction: column;
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem;
    animation: fadeIn 0.3s ease-in-out;
}

.view.active {
    display: flex;
}

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

.app-header {
    text-align: center;
    padding: 1.5rem 0;
}

.app-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.app-header p {
    color: var(--secondary-color);
    margin-top: 0.25rem;
}

.search-bar-container {
    position: relative;
    margin-bottom: 1.5rem;
}

#search-input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 2.5rem; /* Left padding for icon */
    border-radius: 2rem; /* Pill shape */
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-color-light);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    fill: var(--secondary-color);
}

#search-results-container {
    display: none; /* Hidden by default */
    margin-bottom: 1rem;
}

.view-header {
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    z-index: 5;
    padding: 0.5rem 1rem;
    margin: -1rem -1rem 1.5rem -1rem; /* Absorb parent padding */
    border-bottom: 1px solid var(--border-color);
}

.view-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
}

.back-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    position: absolute;
    left: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.5rem;
}

.back-btn svg {
    width: 24px;
    height: 24px;
}

.header-action-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.5rem;
}

.header-action-btn svg {
    width: 24px;
    height: 24px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.category-card {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px var(--shadow-color-soft), 0 2px 4px -1px var(--shadow-color-soft);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px var(--shadow-color-soft), 0 4px 6px -2px var(--shadow-color-soft);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.category-card h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.category-card p {
    font-size: 0.8rem;
    color: var(--secondary-color);
}


/* Calculator List */
.calculator-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.calculator-list-item {
    background-color: var(--card-bg);
    padding: 1rem 1.25rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.calculator-list-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Form & Calculator Styles */
.calculator-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.hidden {
    display: none;
}

.label-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--secondary-color);
}

.form-group input[type="number"], .form-group input[type="text"], .form-group select {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-group select {
    text-align: left;
    padding: 0.75rem;
    cursor: pointer;
}


.form-group input.error {
    border-color: var(--error-color);
}

.form-group input[readonly] {
    background-color: var(--border-color);
    cursor: not-allowed;
}

.error-message {
    font-size: 0.8rem;
    color: var(--error-color);
    height: 1.2em;
    margin-top: 4px;
    margin-bottom: 0.5rem;
}

.form-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 5px;
    outline: none;
    opacity: 0.9;
    transition: opacity .2s;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    border: 3px solid var(--card-bg);
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    border: 3px solid var(--card-bg);
}

/* Button Group / Segmented Control */
.btn-group {
    display: flex;
    background-color: var(--primary-color-light);
    border-radius: 8px;
    padding: 4px;
    width: 100%;
}
.btn-group-item {
    flex: 1;
    padding: 0.75rem 0;
    border: none;
    background-color: transparent;
    color: var(--secondary-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
}
.btn-group-item.active {
    background-color: var(--card-bg);
    color: var(--primary-color);
    box-shadow: 0 1px 3px var(--shadow-color-soft);
}


/* Tooltip Styles */
.tooltip-container {
    position: relative;
    display: inline-block;
}
.tooltip-trigger {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    cursor: pointer;
    user-select: none;
}
.tooltip {
    visibility: hidden;
    opacity: 0;
    width: 200px;
    background-color: var(--text-color);
    color: var(--bg-color);
    text-align: center;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    z-index: 10;
    bottom: 150%;
    left: 50%;
    margin-left: -100px;
    transition: opacity 0.3s;
    font-size: 0.8rem;
}

.tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--text-color) transparent transparent transparent;
}

.tooltip-container.active .tooltip {
    visibility: visible;
    opacity: 1;
}


.cta-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.cta-button:hover {
    opacity: 0.9;
}

.cta-button.secondary {
    background-color: var(--secondary-color);
}

/* Welcome View */
#welcome-view {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 2rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-color);
    z-index: 100;
}

#welcome-view.active {
    display: flex;
}

.welcome-logo {
    width: 120px;
    height: 120px;
    animation: popIn 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55) forwards;
}

@keyframes popIn {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* Results & Chart Styles */
.results-container {
    margin-top: 1rem;
    animation: fadeIn 0.5s;
}

.results-container.hidden {
    display: none;
}

.results-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.result-item {
    background-color: var(--card-bg);
    padding: 1.25rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    word-break: break-word;
}

.result-item p {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.result-item span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.chart-container {
    height: 250px;
    position: relative;
}

.results-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.action-btn {
    flex: 1;
    padding: 0.75rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    background-color: var(--primary-color-light);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.action-btn:hover {
    background-color: var(--primary-color);
    color: white;
}


/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 480px;
    height: 70px;
    background-color: var(--nav-bg);
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -2px 10px var(--shadow-color-soft);
    z-index: 10;
}

.nav-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--nav-icon-color);
    transition: color 0.2s;
    flex: 1;
}

.nav-btn.active {
    color: var(--nav-icon-active);
}

.nav-btn svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.nav-btn span {
    font-size: 0.7rem;
}


/* Settings View */
.settings-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: 12px;
}
.setting-item.link {
    text-decoration: none;
    color: var(--text-color);
}
.setting-item.column {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
}
.setting-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}
.api-key-input-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
}
.api-key-input-container.hidden {
    display: none;
}
.api-key-input-container .disclaimer {
    font-size: 0.8rem;
    text-align: left;
    margin-bottom: -0.5rem;
}
.api-key-input-container input {
    text-align: left;
    font-size: 0.9rem;
    font-weight: 400;
}
.api-key-input-container .cta-button {
    padding: 0.75rem;
    font-size: 0.9rem;
}
.theme-switcher {
    display: flex;
    background-color: var(--bg-color);
    border-radius: 6px;
    padding: 4px;
}
.theme-btn {
    padding: 0.5rem 1rem;
    border: none;
    background-color: transparent;
    color: var(--secondary-color);
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
}
.theme-btn.active {
    background-color: var(--card-bg);
    color: var(--text-color);
    box-shadow: 0 1px 3px var(--shadow-color-soft);
}

/* History View */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.history-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid var(--border-color);
}
.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}
.history-item-header h4 {
    font-size: 1rem;
    font-weight: 600;
}
.history-item-header .timestamp {
    font-size: 0.75rem;
    color: var(--secondary-color);
}
.history-item p {
    font-size: 0.9rem;
    color: var(--secondary-color);
}
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--secondary-color);
}


/* Specific Calculator Styles */
.form-section {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}
.form-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}
.form-section .form-group {
    margin-bottom: 1rem;
}
.form-section .form-group:last-child {
    margin-bottom: 0;
}
.form-section .form-group label {
    font-weight: 400;
}
.results-breakdown {
    margin-top: 1.5rem;
}
.results-breakdown h4 {
    margin-bottom: 0.75rem;
}
.results-breakdown ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.results-breakdown li {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}
.results-breakdown li:last-child {
    border-bottom: none;
}
.results-breakdown li.total {
    font-weight: bold;
    font-size: 1.1em;
}
.results-breakdown li.deduction span:last-child {
    color: var(--error-color);
}
.currency-converter-box {
    display: flex;
    align-items: center;
    gap: 1rem;
}
#currency-swap-btn {
    background: none;
    border: 1px solid var(--border-color);
    height: 48px;
    width: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1rem; /* align with select boxes */
    transition: all 0.2s;
}
#currency-swap-btn:hover {
    background-color: var(--primary-color-light);
    border-color: var(--primary-color);
}
#currency-swap-btn svg {
    width: 24px;
    height: 24px;
    fill: var(--primary-color);
}
#currency-result .result-item {
    background-color: var(--primary-color-light);
    border-color: var(--primary-color);
}
#currency-result-label {
    font-size: 0.9rem;
}
.disclaimer {
    font-size: 0.8rem;
    color: var(--secondary-color);
    text-align: center;
}
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
#loan-comparison-results .result-item,
#emi-rent-results .result-item {
    text-align: left;
    padding: 1rem;
}
#loan-comparison-results .result-item h4,
#emi-rent-results .result-item h4 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}
#loan-comparison-results .result-item p,
#emi-rent-results .result-item p {
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
}
#loan-comparison-results .result-item p span,
#emi-rent-results .result-item p span {
    font-weight: 600;
    font-size: 1rem;
}
#loan-comparison-results .result-item.highlight,
#emi-rent-results .result-item.highlight {
    border: 2px solid var(--success-color);
    box-shadow: 0 0 10px var(--success-color);
}
#loan-comparison-results .result-item.highlight h4,
#emi-rent-results .result-item.highlight h4 {
    color: var(--success-color);
}
#invoice-items-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.invoice-item-row {
    display: grid;
    grid-template-columns: 3fr 1fr 2fr;
    gap: 0.5rem;
}
.invoice-item-row input {
    font-size: 0.9rem;
    text-align: left;
    padding: 0.5rem;
}
.invoice-item-row input[type="number"] {
    text-align: right;
}
#add-invoice-item-btn {
    margin-bottom: 1rem;
}
#salary-slip-content {
    background: var(--card-bg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
}
#slip-header-title {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--primary-color);
}
.slip-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.slip-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 1.5rem;
}
.slip-column h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}
.slip-column ul {
    list-style: none;
}
.slip-column li {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}
.slip-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    text-align: right;
}
.slip-footer p {
    margin-bottom: 0.5rem;
}
.slip-footer .net-salary {
    font-size: 1.2rem;
    font-weight: bold;
}

/* Basic Calculator Styles */
.calculator-grid-container {
  background-color: var(--card-bg);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 4px 6px -1px var(--shadow-color-soft);
}
.basic-calculator-display {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-size: 2.5rem;
  font-weight: 600;
  padding: 1rem;
  border-radius: 12px;
  text-align: right;
  margin-bottom: 1.5rem;
  word-wrap: break-word;
  word-break: break-all;
}
.basic-calculator-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: 1rem;
}
.calculator-btn {
  font-size: 1.5rem;
  font-weight: 500;
  padding: 1rem;
  border: none;
  border-radius: 12px;
  background-color: var(--primary-color-light);
  color: var(--text-color);
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}
.calculator-btn:active {
    transform: scale(0.95);
}
.calculator-btn.operator {
  background-color: var(--secondary-color);
  color: white;
}
.calculator-btn.equals {
  background-color: var(--primary-color);
  color: white;
  grid-row: span 2;
}
.calculator-btn.zero {
  grid-column: span 2;
}

/* Maya AI Chat Styles */
#maya-ai-view {
    /* The flex properties from .view are enough */
}

#maya-ai-view .view-header {
    border-bottom: 1px solid var(--border-color);
}

.chat-window {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 0 0.5rem;
}
.chat-message {
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-radius: 1.25rem;
    line-height: 1.5;
}
.chat-message p {
    margin: 0;
    white-space: pre-wrap; /* Respect newlines and wrap text */
}
.ai-message {
    background-color: var(--primary-color-light);
    color: var(--text-color);
    border-bottom-left-radius: 0.25rem;
    align-self: flex-start;
}
.user-message {
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 0.25rem;
    align-self: flex-end;
}
.loading-indicator {
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
}
.loading-indicator span {
    display: block;
    width: 8px;
    height: 8px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}
.loading-indicator span:nth-child(1) { animation-delay: -0.32s; }
.loading-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1.0); }
}

.chat-input-container {
    display: flex;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-color); /* Match background */
    margin: 0 -1rem -1rem; /* Absorb parent padding */
    padding: 1rem;
}
#chat-input {
    flex-grow: 1;
    border-radius: 2rem;
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
}
#chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
}
#send-chat-btn {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
#send-chat-btn svg {
    width: 24px;
    height: 24px;
}