:root {
    /* Light Theme (Default) */
    --primary: #111111;
    --primary-hover: #000000;
    --accent: #FFCA07;
    --bg-color: #F5F5F7;
    --surface: #FFFFFF;
    --surface-hover: #FAFAFA;
    --border: #E5E5EA;
    --border-hover: #D1D1D6;
    --text-main: #1D1D1F;
    --text-muted: #86868B;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.04), 0 2px 8px rgba(0, 0, 0, 0.02);
    --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.03);
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);

    --display-sun: block;
    --display-moon: none;

    --pricing-bg: #101010;
    --pricing-text: #F5F5F7;
    --pricing-muted: #86868B;
    --pricing-divider: rgba(255, 255, 255, 0.1);
}

body.dark {
    /* Dark Theme */
    --primary: #FFFFFF;
    --primary-hover: #EBEBEB;
    --bg-color: #000000;
    --surface: #1C1C1E;
    --surface-hover: #2C2C2E;
    --border: #3A3A3C;
    --border-hover: #48484A;
    --text-main: #F5F5F7;
    --text-muted: #86868B;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.6);

    --display-sun: none;
    --display-moon: block;

    --pricing-bg: #101010;
    --pricing-text: #FFFFFF;
    --pricing-muted: rgba(255, 255, 255, 0.7);
    --pricing-divider: rgba(255, 255, 255, 0.2);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
    min-height: 100vh;
}

/* Header Styles */
.app-header {
    text-align: center;
    margin-bottom: 4rem;
}

.header-top {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    margin-bottom: 0.5rem;
}

.app-header h1 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    font-weight: 500;
}

.theme-btn,
.back-btn {
    position: absolute;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-main);
    padding: 8px;
    border-radius: 50%;
    transition: background-color 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn {
    right: 0;
}

.back-btn {
    left: 0;
}

.theme-btn:hover,
.back-btn:hover {
    background-color: var(--surface-hover);
}

.back-btn:hover {
    transform: translateX(-3px);
}

.sun-icon {
    display: var(--display-sun);
}

.moon-icon {
    display: var(--display-moon);
}

.app-header h2 {
    font-size: 38px;
    font-weight: 600;
    letter-spacing: -2px;
    color: var(--text-main);
    margin-bottom: 0.75rem;
}

.app-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Estimator Panel */
.estimator-panel {
    width: 100%;
    margin-bottom: 2.5rem;
}

.glass-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    width: 100%;
    margin-bottom: 2.5rem;
    padding: 2.5rem;
}

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

.calculator-card,
.lead-card {
    padding: 2.5rem;
}

.glass-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    width: 100%;
    margin-bottom: 2.5rem;
}

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

.calculator-card,
.lead-card {
    padding: 2.5rem;
}

.calculator-card {
    /* Keeping estimator specifics if any */
}

.lead-layout {
    margin-top: 1rem;
}

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

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.6rem;
    color: var(--text-main);
    font-size: 0.95rem;
}

.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: "▼";
    font-size: 0.6rem;
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-muted);
}

select,
input {
    appearance: none;
    width: 100%;
    padding: 1rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background-color: var(--surface);
    color: var(--text-main);
    transition: var(--transition);
}

select:focus,
input:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 202, 7, 0.15);
}

/* Hide number input spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

textarea {
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-main);
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
    padding: 1.25rem;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(255, 202, 7, 0.1);
    background-color: var(--surface-hover);
}

#custom-product-container {
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 1;
    transform: translateY(0);
    overflow: hidden;
    max-height: 400px;
}

#custom-product-container.hidden {
    opacity: 0;
    transform: translateY(-10px);
    max-height: 0;
    margin-top: 0 !important;
    margin-bottom: 0 !important;
    pointer-events: none;
    display: block !important;
    /* Override .hidden display:none to allow transition */
}

.quantity-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    padding-left: 0.25rem;
    font-weight: 500;
    transition: var(--transition);
}

.quantity-hint.unlock {
    color: #4CAF50;
    /* Success green */
}

.quantity-hint.highlight {
    color: #FFCA07;
    /* Highlight yellow */
    font-weight: 600;
}

/* Dark mode specific for highlight visibility */
body.dark .quantity-hint.highlight {
    color: #ffd84d;
}

.catalog-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    line-height: 1.4;
}

.catalog-hint a {
    color: var(--text-muted);
    text-decoration: underline;
    text-underline-offset: 2px;
    font-weight: 500;
    transition: var(--transition);
}

.catalog-hint a:hover {
    color: var(--text-main);
}

.catalog-hint.secondary {
    margin-top: 1rem;
    text-align: center;
}

.hidden {
    display: none !important;
}

/* Empty State Message */
.empty-state-container {
    padding: 3.5rem 2rem;
    text-align: center;
    background: transparent;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    margin-top: 0;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.4s ease;
}

.empty-state-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: #a1a1a6;
}

.empty-state-msg svg {
    color: var(--accent);
    opacity: 0.6;
}

.empty-state-msg p {
    font-size: 1rem;
    font-weight: 500;
}

/* Addons */
.addons-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.addon-checkbox {
    display: flex;
    align-items: center;
    position: relative;
    padding: 1rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.addon-checkbox:hover {
    border-color: var(--border-hover);
    background-color: var(--surface-hover);
}

.addon-left {
    display: flex;
    align-items: center;
    flex-grow: 1;
}

.custom-checkbox {
    position: relative;
    width: 20px;
    height: 20px;
    margin-right: 1rem;
    flex-shrink: 0;
}

.custom-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
    margin: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    width: 20px;
    background-color: transparent;
    border: 2px solid var(--border);
    border-radius: 6px;
    transition: var(--transition);
}

.custom-checkbox:hover input~.checkmark {
    border-color: var(--border-hover);
}

.custom-checkbox input:checked~.checkmark {
    background-color: var(--accent);
    border-color: var(--accent);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.custom-checkbox input:checked~.checkmark:after {
    display: block;
}

.custom-checkbox .checkmark:after {
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid #111;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.addon-name {
    font-weight: 500;
    font-size: 0.95rem;
}

.addon-price {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Pricing Display */
.pricing-display {
    background: #191919;
    color: #ffffff;
    border-radius: var(--radius-md);
    padding: 2.5rem;
    margin-top: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: background-color 0.4s ease;
}

body.dark .pricing-display {
    background-color: #101010;
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    color: #a1a1a6;
    font-weight: 500;
}

.price-divider {
    height: 1px;
    background-color: rgba(255, 255, 255, 0.05);
    margin: 1.5rem 0;
}

.price-row.total {
    color: #ffffff;
    align-items: center;
}

.price-value {
    color: #ffffff;
}

.price-value.highlight {
    font-size: clamp(28px, 6vw, 48px);
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -1.5px;
    line-height: 1.2;
    word-break: break-word;
}

@media (max-width: 480px) {
    .price-row.total {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
}

#pricing-box-container {
    width: 100%;
}

/* Empty State Message */
.empty-state-container {
    padding: 3rem 2rem;
    text-align: center;
    background: var(--surface-hover);
    border: 1px dashed var(--border);
    border-radius: var(--radius-md);
    margin-top: 2rem;
    animation: fadeIn 0.4s ease;
}

.empty-state-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
}

/* Tailored Quote Msg */
.tailored-quote-msg {
    padding: 2.5rem;
    text-align: center;
    background: #191919;
    border-radius: var(--radius-md);
    margin-top: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    animation: fadeIn 0.4s ease;
    color: #ffffff;
    transition: background-color 0.4s ease;
}

body.dark .tailored-quote-msg {
    background-color: #101010;
}

.msg-icon {
    margin-bottom: 1rem;
    color: #FFCA07;
}

.tailored-quote-msg p {
    color: #a1a1a6;
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 400px;
    margin: 0 auto;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Lead Section */
.lead-card {
    padding: 2.5rem;
    text-align: center;
}

.lead-card h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.lead-desc {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.input-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    margin-bottom: 2rem;
    text-align: left;
}

@media (min-width: 600px) {
    .input-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.submit-btn {
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
    padding: 1.15rem;
    background-color: var(--primary);
    color: var(--bg-color);
    /* Contrast color */
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1.05rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.submit-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

body.dark .submit-btn {
    background-color: var(--accent);
    color: #111;
}

body.dark .submit-btn:hover {
    background-color: #E6B606;
}

/* WhatsApp CTA */
.whatsapp-container {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.whatsapp-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: transparent;
    border: 1.5px solid #25D366;
    border-radius: var(--radius-md);
    color: #25D366;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.whatsapp-btn:hover {
    background-color: #25D366;
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(37, 211, 102, 0.15);
}

body.dark .whatsapp-btn {
    border-color: #25D366;
    color: #25D366;
}

body.dark .whatsapp-btn:hover {
    background-color: #25D366;
    color: #000;
}

/* Success Card */
.success-card {
    text-align: center;
    padding: 5rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.success-card.hidden {
    display: none;
}

.success-icon {
    margin-bottom: 1.5rem;
    background-color: rgba(255, 202, 7, 0.1);
    color: var(--accent);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scaleIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes scaleIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.secondary-btn {
    padding: 0.8rem 2rem;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: inherit;
    color: var(--text-main);
    cursor: pointer;
    transition: var(--transition);
}

.secondary-btn:hover {
    background-color: var(--surface-hover);
    border-color: var(--text-main);
}