/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */
:root {
    --primary: #c62828;
    --primary-dark: #8e0000;
    --primary-light: #ff5f52;
    --secondary: #455a64;
    --secondary-dark: #37474f;
    --secondary-light: #718792;
    --light: #f5f5f5;
    --dark: #263238;
    --gray: #90a4ae;
    --gray-light: #eceff1;
    --gray-dark: #546e7a;
    --success: #2e7d32;
    --warning: #f9a825;
    --info: #0288d1;
    --danger: #d32f2f;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
    --container-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f9f9f9;
    color: var(--dark);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--dark);
}

h1 { font-size: 2.2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.3rem; }

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    border-radius: 0 0 var(--radius) var(--radius);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo i {
    font-size: 2.5rem;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    margin-bottom: 5px;
}

.logo span {
    font-size: 0.9rem;
    opacity: 0.9;
    color: rgba(255, 255, 255, 0.9);
}

.standards {
    background-color: rgba(255, 255, 255, 0.15);
    padding: 10px 15px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-info {
    background-color: rgba(255, 255, 255, 0.15);
    padding: 15px;
    border-radius: var(--radius-sm);
    min-width: 280px;
}

.project-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.project-client {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Navigation */
.main-nav {
    background-color: white;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    border-radius: var(--radius-sm);
}

.main-nav ul {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
}

.main-nav li {
    flex: 1;
    text-align: center;
}

.main-nav a {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--secondary);
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.main-nav a:hover {
    background-color: var(--gray-light);
    text-decoration: none;
    color: var(--primary);
}

.main-nav .active a {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background-color: rgba(198, 40, 40, 0.05);
}

.mode-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 0 1.5rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.mode-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--secondary);
}

/* ============================================
   MAIN CONTENT & LAYOUT
   ============================================ */
.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-light);
}

.page-header h2 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--gray-dark);
    font-size: 1.1rem;
}

.back-home {
    margin-bottom: 1.5rem;
}

.back-home .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 1024px) {
    main {
        grid-template-columns: 1fr;
    }
}

.column {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 25px;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-title {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--gray-light);
}

.card-title i {
    font-size: 1.3rem;
}

.summary-card {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    color: white;
}

.summary-card .card-title {
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary);
}

.required::after {
    content: " *";
    color: var(--primary);
}

input, select, textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(198, 40, 40, 0.1);
}

.input-with-unit {
    position: relative;
}

.unit {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
    font-size: 0.9rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
}

.currency-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-light);
}

.currency-selector label {
    margin-bottom: 0;
    white-space: nowrap;
}

.currency-selector select {
    width: auto;
    min-width: 120px;
}

/* ============================================
   APPLIANCE SELECTION
   ============================================ */
.appliance-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

@media (max-width: 768px) {
    .appliance-list {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

.appliance-item {
    background-color: var(--gray-light);
    border: 2px solid #e9ecef;
    border-radius: var(--radius-sm);
    padding: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.appliance-item:hover {
    border-color: var(--primary-light);
    background-color: #fff5f5;
}

.appliance-item.selected {
    border-color: var(--primary);
    background-color: #ffebee;
}

.appliance-name {
    font-weight: 600;
    margin-bottom: 5px;
}

.appliance-nozzles {
    font-size: 0.9rem;
    color: var(--primary);
}

.custom-appliance-form {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 10px;
}

@media (max-width: 768px) {
    .custom-appliance-form {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   SUMMARY & RESULTS
   ============================================ */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

@media (max-width: 480px) {
    .summary-grid {
        grid-template-columns: 1fr;
    }
}

.summary-item {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 15px;
    text-align: center;
}

.summary-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 5px;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.summary-value.highlight {
    color: #ffcc00;
    font-size: 1.8rem;
}

.total-cost {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    margin-bottom: 25px;
}

.total-label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 5px;
}

.total-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 5px;
}

.currency-note {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-2px);
}

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

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

.btn-secondary {
    background-color: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    color: white;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background-color: rgba(198, 40, 40, 0.05);
    color: var(--primary-dark);
}

.btn-lg {
    padding: 15px 30px;
    font-size: 1.1rem;
}

/* ============================================
   EXPERT MODE
   ============================================ */
.expert-panel-card {
    margin-top: 30px;
    margin-bottom: 40px;
}

.expert-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
}

.expert-panel.expanded {
    max-height: 1000px;
}

.expert-panel-content {
    padding-top: 20px;
    border-top: 1px solid var(--gray-light);
}

/* ============================================
   SAFETY WARNING STYLES
   ============================================ */
.safety-status {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: var(--radius-sm);
    margin-bottom: 15px;
}

.safety-status.safe {
    background-color: #e8f5e9;
    border-left: 4px solid #2e7d32;
    color: #2e7d32;
}

.safety-status.warning {
    background-color: #fff8e1;
    border-left: 4px solid #f9a825;
    color: #f57f17;
}

.safety-status.loading {
    background-color: #e3f2fd;
    border-left: 4px solid #1565c0;
    color: #1565c0;
}

.safety-status i {
    font-size: 1.5rem;
}

.safety-status div {
    flex: 1;
}

.safety-status strong {
    display: block;
    margin-bottom: 3px;
}

.safety-status small {
    opacity: 0.8;
    font-size: 0.85rem;
}

.warning-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.warning-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 15px;
    margin-bottom: 8px;
    background-color: rgba(249, 168, 37, 0.1);
    border-radius: var(--radius-sm);
    border-left: 3px solid #f9a825;
}

.warning-list li i {
    color: #f9a825;
    margin-top: 2px;
}

.spinner.small {
    width: 30px;
    height: 30px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0;
}

/* ============================================
   EXPLORE TOOLS SECTION
   ============================================ */
.explore-tools {
    padding: 3rem 0;
    margin: 3rem 0;
    border-top: 1px solid var(--gray-light);
    border-bottom: 1px solid var(--gray-light);
}

.section-subtitle {
    text-align: center;
    color: var(--gray-dark);
    margin-bottom: 2rem;
    font-size: 1.1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
}

.tool-card {
    background: white;
    border-radius: var(--radius);
    padding: 1.8rem;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.tool-card h3 {
    color: var(--dark);
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

.tool-card p {
    color: var(--gray-dark);
    flex-grow: 1;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    margin-top: auto;
}

.tool-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ============================================
   AFFILIATE BANNERS
   ============================================ */
.affiliate-banner {
    margin: 2rem 0;
    text-align: center;
}

.amazon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    background: linear-gradient(135deg, #ff9900, #ff6600);
    color: white;
    padding: 18px 30px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.amazon-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: white;
}

.sale-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background-color: var(--primary);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    transform: rotate(10deg);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.banner-text {
    flex-grow: 1;
}

.coffee-container {
    text-align: center;
    margin: 2rem 0;
    padding: 2rem;
    background-color: rgba(255, 215, 0, 0.05);
    border-radius: var(--radius);
    border: 1px dashed #ffd700;
}

.coffee-button img {
    height: 50px;
    transition: var(--transition);
}

.coffee-button img:hover {
    transform: scale(1.05);
}

/* ============================================
   ALERTS & DISCLAIMERS
   ============================================ */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 25px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.alert i {
    font-size: 1.2rem;
    margin-top: 2px;
}

.alert-info {
    background-color: #e3f2fd;
    color: var(--info);
    border-left: 4px solid var(--info);
}

.disclaimer {
    background-color: #fff8e1;
    border-left: 4px solid var(--warning);
    padding: 20px;
    border-radius: var(--radius-sm);
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

.disclaimer i {
    color: var(--warning);
    font-size: 1.5rem;
    margin-top: 2px;
}

.disclaimer div {
    flex: 1;
}

/* ============================================
   LOADING & EMPTY STATES
   ============================================ */
.loading-state, .empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--gray-dark);
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

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

.no-data, .no-quotation {
    text-align: center;
    padding: 4rem 2rem;
}

.no-data i, .no-quotation i {
    font-size: 4rem;
    color: var(--gray);
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

/* ============================================
   RECENT CALCULATIONS STYLES
   ============================================ */
.recent-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.recent-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: var(--gray-light);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--secondary);
    transition: var(--transition);
}

.recent-item:hover {
    background-color: #e8eaed;
    transform: translateX(5px);
}

.recent-project {
    font-weight: 600;
    color: var(--dark);
    flex: 1;
}

.recent-details {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-dark);
    font-size: 0.9rem;
    margin-right: 15px;
}

.btn-recent-load {
    background-color: var(--secondary);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.btn-recent-load:hover {
    background-color: var(--secondary-dark);
}

/* ============================================
   HELP LIST STYLES
   ============================================ */
.help-list {
    list-style: none;
    padding: 0;
}

.help-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    padding: 8px 0;
    border-bottom: 1px dashed #eee;
}

.help-list li:last-child {
    border-bottom: none;
}

.help-list i {
    color: var(--success);
    margin-top: 2px;
}

/* ============================================
   DROPDOWN STYLES
   ============================================ */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    cursor: pointer;
    position: relative;
    padding-right: 30px;
}

.dropdown-toggle:after {
    content: "▼";
    font-size: 0.7em;
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
}

.dropdown-menu {
    display: none;
    position: absolute;
    background: white;
    min-width: 180px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-radius: var(--radius-sm);
    z-index: 100;
    margin-top: 5px;
    overflow: hidden;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-item {
    display: block;
    padding: 12px 15px;
    color: var(--dark);
    text-decoration: none;
    border-bottom: 1px solid #eee;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--gray-light);
    color: var(--primary);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item i {
    margin-right: 8px;
    width: 20px;
}

/* ============================================
   EMERGENCY GUIDANCE STYLES
   ============================================ */
.emergency-guidance {
    background: linear-gradient(135deg, #f5f5f5, #e8e8e8);
    padding: 3rem 0;
    margin: 3rem 0;
    border-top: 1px solid #ddd;
    border-bottom: 1px solid #ddd;
}

.emergency-guidance h2 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 2rem;
}

.guidance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 1rem;
}

.guidance-card {
    background: white;
    padding: 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.guidance-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.guidance-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.guidance-icon.emergency {
    background: #ffebee;
    color: var(--primary);
}

.guidance-icon.warning {
    background: #fff8e1;
    color: #f9a825;
}

.guidance-icon.info {
    background: #e3f2fd;
    color: #1565c0;
}

.guidance-card h3 {
    color: var(--secondary);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.guidance-card ul {
    list-style: none;
    padding: 0;
}

.guidance-card li {
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
    line-height: 1.5;
}

.guidance-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    background-color: var(--secondary-dark);
    color: white;
    padding: 2.5rem 0;
    margin-top: 3rem;
    border-radius: var(--radius) var(--radius) 0 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 600;
}

.footer-logo i {
    color: var(--primary-light);
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.footer-links a:hover {
    color: white;
    text-decoration: underline;
}

.footer-disclaimer {
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    max-width: 800px;
    line-height: 1.5;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    header, .main-nav, .affiliate-banner, 
    .coffee-container, .explore-tools, 
    .emergency-guidance, footer, 
    .btn, .back-home, .no-print,
    .dropdown, .print-controls,
    .safety-status, .warning-list {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
        font-size: 12pt;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
        margin: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    .summary-card {
        background: #f5f5f5 !important;
        color: black !important;
        -webkit-print-color-adjust: exact;
    }
    
    .summary-card .card-title {
        color: black !important;
        border-bottom-color: #ddd !important;
    }
    
    .summary-item {
        background: #eee !important;
        color: black !important;
        -webkit-print-color-adjust: exact;
    }
    
    .summary-label {
        color: #666 !important;
    }
    
    .summary-value {
        color: black !important;
    }
    
    .total-cost {
        background: #ddd !important;
        color: black !important;
        -webkit-print-color-adjust: exact;
    }
    
    .total-value {
        color: black !important;
    }
}

/* ============================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-contrast: high) {
    :root {
        --primary: #b71c1c;
        --primary-dark: #7f0000;
        --secondary: #263238;
        --secondary-dark: #000a12;
    }
    
    .card {
        border: 2px solid var(--dark);
    }
    
    input, select, textarea {
        border: 2px solid var(--dark);
    }
}

/* ============================================
   MOBILE RESPONSIVENESS
   ============================================ */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .standards, .project-info {
        width: 100%;
        text-align: center;
    }
    
    .main-nav ul {
        flex-direction: column;
    }
    
    .main-nav li {
        flex: none;
    }
    
    .mode-toggle {
        justify-content: center;
        padding: 1rem;
        border-top: 1px solid var(--gray-light);
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .guidance-grid {
        grid-template-columns: 1fr;
    }
    
    .dropdown-menu {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        border-radius: var(--radius) var(--radius) 0 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.3rem; }
    
    .card {
        padding: 20px;
    }
    
    .total-value {
        font-size: 1.8rem;
    }
    
    .appliance-list {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   QUOTATION PAGE SPECIFIC STYLES
   ============================================ */
.quotation-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.quotation-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 2rem 0;
    margin-bottom: 2rem;
    border-radius: 0 0 var(--radius) var(--radius);
}

.quotation-header .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.quotation-title-main {
    color: white;
    font-size: 2.2rem;
    margin: 0;
    font-weight: 700;
}

.quote-number-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 600;
    display: inline-block;
}

.company-details-card {
    background: white;
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    border-left: 5px solid var(--primary);
}

.company-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid #eee;
}

.company-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    min-width: 300px;
}

.company-logo i {
    font-size: 3rem;
    color: var(--primary);
}

.company-info h2 {
    color: var(--primary);
    margin-bottom: 5px;
    font-size: 1.8rem;
}

.company-info p {
    margin-bottom: 5px;
    color: var(--secondary);
}

.quotation-meta {
    text-align: right;
    min-width: 200px;
}

.quotation-meta .date {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.valid-until {
    color: var(--success);
    font-weight: 600;
    background: rgba(46, 125, 50, 0.1);
    padding: 8px 15px;
    border-radius: var(--radius-sm);
    display: inline-block;
    margin-top: 5px;
}

.client-info-card {
    background: var(--gray-light);
    padding: 25px;
    border-radius: var(--radius);
    margin-bottom: 25px;
}

.client-info-card h3 {
    color: var(--primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
}

.client-details {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.client-detail-item {
    background: white;
    padding: 15px;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
    transition: var(--transition);
}

.client-detail-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.client-detail-item strong {
    color: var(--secondary);
    display: block;
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.quotation-table-container {
    overflow-x: auto;
    margin: 30px 0;
    border-radius: var(--radius);
    border: 1px solid var(--gray-light);
}

.quotation-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    min-width: 800px;
}

.quotation-table thead {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.quotation-table th {
    padding: 18px 15px;
    text-align: left;
    font-weight: 600;
    border: none;
    font-size: 1rem;
}

.quotation-table tbody tr {
    border-bottom: 1px solid #eee;
    transition: var(--transition);
}

.quotation-table tbody tr:nth-child(even) {
    background: #f9f9f9;
}

.quotation-table tbody tr:hover {
    background: rgba(198, 40, 40, 0.03);
}

.quotation-table td {
    padding: 15px;
    vertical-align: middle;
}

.category-row {
    background: #f5f5f5 !important;
    font-weight: 600;
    color: var(--primary);
    font-size: 1rem;
}

.total-row {
    background: var(--gray-light) !important;
    font-weight: 600;
    font-size: 1.1rem;
}

.grand-total-row {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
}

.grand-total-row td {
    padding: 20px 15px;
}

.terms-section {
    background: white;
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-top: 30px;
    margin-bottom: 40px;
}

.terms-section h3 {
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
}

.terms-list {
    padding-left: 20px;
    margin-bottom: 30px;
}

.terms-list li {
    margin-bottom: 12px;
    line-height: 1.6;
    color: var(--secondary);
}

.signature-area {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid #eee;
}

.signature-box {
    text-align: center;
    padding: 20px;
    background: var(--gray-light);
    border-radius: var(--radius);
}

.signature-line {
    height: 1px;
    background: #333;
    margin: 40px 0 20px;
    position: relative;
}

.signature-line:after {
    content: "";
    position: absolute;
    top: -15px;
    left: 0;
    right: 0;
    height: 30px;
    border-bottom: 1px solid #333;
}

.print-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 1000;
}

.print-controls .btn {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.calculation-notice {
    background: #fff8e1;
    border-left: 4px solid #f9a825;
    padding: 20px;
    border-radius: var(--radius-sm);
    margin: 20px 0;
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.calculation-notice i {
    color: #f9a825;
    font-size: 1.5rem;
    margin-top: 2px;
}

.calculation-notice strong {
    color: var(--danger);
}

.system-summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.summary-card-item {
    background: white;
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--primary);
    transition: var(--transition);
}

.summary-card-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.summary-card-item .label {
    font-size: 0.9rem;
    color: var(--gray-dark);
    margin-bottom: 8px;
    font-weight: 600;
}

.summary-card-item .value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.summary-card-item .detail {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.4;
}

.total-display {
    background: linear-gradient(135deg, #ff9800, #f57c00);
    color: white;
    padding: 30px;
    border-radius: var(--radius);
    text-align: center;
    margin: 30px 0;
    box-shadow: var(--shadow);
}

.total-display .label {
    font-size: 1.1rem;
    margin-bottom: 10px;
    opacity: 0.9;
    font-weight: 600;
}

.total-display .amount {
    font-size: 2.8rem;
    font-weight: 800;
    margin: 10px 0;
    letter-spacing: 1px;
}

.total-display .note {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-top: 10px;
}

.btn-outline-secondary {
    background-color: transparent;
    color: var(--secondary);
    border: 2px solid var(--secondary);
}

.btn-outline-secondary:hover {
    background-color: rgba(69, 90, 100, 0.05);
    color: var(--secondary-dark);
}

.no-print {
    display: block;
}

/* Enhanced responsive styles for quotation page */
@media (max-width: 1024px) {
    .company-header {
        flex-direction: column;
        gap: 20px;
    }
    
    .quotation-meta {
        text-align: left;
        width: 100%;
    }
    
    .signature-area {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .quotation-header .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .quote-number-badge {
        margin-top: 10px;
    }
    
    .company-logo {
        flex-direction: column;
        text-align: center;
        min-width: auto;
    }
    
    .client-details {
        grid-template-columns: 1fr;
    }
    
    .system-summary-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .print-controls {
        position: static;
        justify-content: center;
        margin: 20px 0;
        flex-wrap: wrap;
    }
    
    .quotation-table {
        min-width: 600px;
    }
    
    .total-display .amount {
        font-size: 2.2rem;
    }
}

@media (max-width: 480px) {
    .system-summary-cards {
        grid-template-columns: 1fr;
    }
    
    .quotation-table th,
    .quotation-table td {
        padding: 10px 8px;
        font-size: 0.9rem;
    }
    
    .total-display .amount {
        font-size: 1.8rem;
    }
    
    .terms-section {
        padding: 20px 15px;
    }
}

@media print {
    .print-controls,
    .no-print {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        background: white;
        color: black;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
        margin: 0;
    }
    
    .quotation-header {
        background: #333 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .quotation-table thead {
        background: #333 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .grand-total-row {
        background: #333 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .total-display {
        background: #666 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
    
    .quotation-table {
        page-break-inside: avoid;
    }
    
    .signature-area {
        page-break-inside: avoid;
    }
}