/* ===================================================================
   REGENGROW USA - Premium Medical Aesthetics Website
   =================================================================== */

/* ----- CSS Custom Properties ----- */
:root {
    --color-primary: #1a1410;
    --color-primary-light: #2d2218;
    --color-accent: #E8772E;
    --color-accent-light: #F49245;
    --color-accent-dark: #C4611A;
    --color-gold: #C9A84C;
    --color-gold-light: #D9BE6E;
    --color-gold-dark: #A88B34;
    --color-red: #BE202E;
    --color-red-light: #d4343f;
    --color-white: #ffffff;
    --color-off-white: #FBF8F3;
    --color-light-gray: #F2EDE5;
    --color-warm-gray: #E8E0D4;
    --color-gray: #9a9088;
    --color-dark-gray: #4a4440;
    --color-text: #2d2420;
    --color-text-light: #6b5f58;
    --color-positive: #2a9d6a;
    --color-negative: #c44b4b;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;

    --shadow-sm: 0 2px 8px rgba(26, 20, 16, 0.06);
    --shadow-md: 0 4px 20px rgba(26, 20, 16, 0.1);
    --shadow-lg: 0 8px 40px rgba(26, 20, 16, 0.14);
    --shadow-xl: 0 16px 60px rgba(26, 20, 16, 0.18);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ----- Reset & Base ----- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

/* ----- Container ----- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ----- Typography ----- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
}

/* ----- Buttons ----- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    border-color: var(--color-gold);
    text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    border-color: var(--color-gold-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 24px rgba(232, 119, 46, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-white);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.05rem;
}

.btn-full {
    width: 100%;
}

/* ===================================================================
   NAVIGATION
   =================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(26, 20, 16, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(201, 168, 76, 0.12);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-family: var(--font-sans);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.logo-regen {
    color: var(--color-white);
}

.logo-grow {
    color: var(--color-accent);
    text-shadow: 0 0 20px rgba(232, 119, 46, 0.3);
}

.logo-usa {
    font-size: 0.6em;
    color: var(--color-gray);
    font-weight: 500;
    margin-left: 4px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.88rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.08);
}

.nav-cta {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark)) !important;
    color: var(--color-white) !important;
    border: 1px solid var(--color-gold) !important;
    font-weight: 600;
    margin-left: 8px;
}

.nav-cta:hover {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent)) !important;
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===================================================================
   HERO SECTION
   =================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(232, 119, 46, 0.18) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(201, 168, 76, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(232, 119, 46, 0.08) 0%, transparent 50%),
        linear-gradient(180deg, #1a1410 0%, #261c14 40%, #1a1410 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 119, 46, 0.07) 0%, transparent 70%);
    animation: heroPulse 8s ease-in-out infinite;
}

@keyframes heroPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(232, 119, 46, 0.015) 2px,
            rgba(232, 119, 46, 0.015) 4px
        );
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 120px 24px 80px;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(232, 119, 46, 0.15);
    border: 1px solid rgba(201, 168, 76, 0.4);
    border-radius: var(--radius-xl);
    color: var(--color-gold-light);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 32px;
    animation: fadeInDown 0.8s ease-out;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-highlight {
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 650px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px 32px;
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    font-weight: 500;
}

.hero-feature svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.scroll-indicator {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ----- Gold Accent Borders on Cards ----- */
.about-card,
.advantage-card:not(.advantage-featured),
.app-card,
.proto-card {
    border: 1px solid rgba(201, 168, 76, 0.12);
}

.about-card:hover,
.advantage-card:not(.advantage-featured):hover,
.app-card:hover {
    border-color: rgba(232, 119, 46, 0.3);
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* ===================================================================
   SECTIONS - Common Styles
   =================================================================== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-primary);
    margin-bottom: 20px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 650px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Animate on scroll */
[data-animate] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================================================
   ABOUT SECTION
   =================================================================== */
.section-about {
    background: var(--color-off-white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--color-white);
    padding: 40px 28px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 40px rgba(232, 119, 46, 0.1);
}

.about-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
}

.about-icon svg {
    width: 100%;
    height: 100%;
    color: var(--color-accent);
}

.about-card h3 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 12px;
    font-family: var(--font-sans);
    font-weight: 700;
}

.about-card p {
    font-size: 0.92rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===================================================================
   TECHNOLOGY SECTION
   =================================================================== */
.section-technology {
    background: var(--color-white);
}

.tech-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tech-tab-buttons {
    display: flex;
    gap: 4px;
    background: var(--color-light-gray);
    padding: 4px;
    border-radius: var(--radius-md);
    margin-bottom: 48px;
}

.tech-tab-btn {
    flex: 1;
    padding: 14px 24px;
    border: none;
    background: transparent;
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--color-text-light);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.tech-tab-btn.active {
    background: var(--color-white);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.tech-tab-btn:hover:not(.active) {
    color: var(--color-primary);
}

.tech-tab-content {
    display: none;
    animation: fadeInUp 0.5s ease-out;
}

.tech-tab-content.active {
    display: block;
}

.tech-content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.tech-text h3 {
    font-size: 1.6rem;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.tech-text p {
    color: var(--color-text-light);
    margin-bottom: 24px;
    line-height: 1.8;
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tech-list li {
    padding-left: 24px;
    position: relative;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text);
}

.tech-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
}

.tech-list li strong {
    color: var(--color-primary);
}

/* Technology Diagram */
.tech-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.diagram-tube {
    width: 120px;
    border-radius: 0 0 60px 60px;
    overflow: hidden;
    border: 3px solid var(--color-primary-light);
    border-top: 3px solid var(--color-primary-light);
}

.tube-layer {
    padding: 24px 12px;
    text-align: center;
    color: var(--color-white);
}

.tube-layer span {
    display: block;
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
}

.tube-layer small {
    display: block;
    font-size: 0.6rem;
    opacity: 0.8;
    margin-top: 2px;
}

.tube-ppp {
    background: linear-gradient(180deg, #F5DFA3, #E8CB7A);
    color: var(--color-primary);
}

.tube-cgf {
    background: linear-gradient(180deg, #E8772E, #C4611A);
    padding: 32px 12px;
    border-top: 2px solid var(--color-gold);
    border-bottom: 2px solid var(--color-gold);
}

.tube-rbc {
    background: linear-gradient(180deg, #8b2020, #6b1515);
}

.diagram-caption {
    margin-top: 20px;
    font-size: 0.85rem;
    color: var(--color-text-light);
    text-align: center;
}

/* Technology Process Flow */
.tech-process-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.process-step-mini {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 16px;
    background: var(--color-off-white);
    border-radius: var(--radius-md);
    min-width: 100px;
}

.step-icon-mini {
    width: 40px;
    height: 40px;
    color: var(--color-accent);
}

.step-icon-mini svg {
    width: 100%;
    height: 100%;
}

.process-step-mini span {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
}

.process-arrow {
    font-size: 1.5rem;
    color: var(--color-accent);
    font-weight: 300;
}

/* Comparison Table */
.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--color-light-gray);
}

.comparison-table thead th {
    background: var(--color-primary);
    color: var(--color-white);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.comparison-table thead th:first-child {
    border-radius: var(--radius-sm) 0 0 0;
}

.comparison-table thead th:last-child {
    border-radius: 0 var(--radius-sm) 0 0;
}

.comparison-table tbody tr:hover {
    background: var(--color-off-white);
}

.highlight-col {
    background: rgba(232, 119, 46, 0.07) !important;
    font-weight: 600;
}

.text-positive {
    color: var(--color-positive);
}

.text-negative {
    color: var(--color-negative);
}

/* ===================================================================
   PRODUCTS SECTION
   =================================================================== */
.section-products {
    background: var(--color-off-white);
}

.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-image-wrapper {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(201, 168, 76, 0.2);
}

.product-main-image {
    max-height: 500px;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.product-badge-italy {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 70px;
    height: 70px;
}

.product-badge-italy svg {
    width: 100%;
    height: 100%;
}

.product-details h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.product-tagline {
    font-size: 1.05rem;
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    font-style: italic;
    margin-bottom: 20px;
}

.product-details > p {
    color: var(--color-text-light);
    margin-bottom: 32px;
    line-height: 1.8;
}

.product-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

.spec-item {
    padding: 16px;
    background: var(--color-white);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-accent);
    border-top: 1px solid rgba(201, 168, 76, 0.15);
    border-bottom: 1px solid rgba(201, 168, 76, 0.15);
    border-right: 1px solid rgba(201, 168, 76, 0.15);
}

.spec-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    margin-bottom: 4px;
}

.spec-value {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--color-primary);
}

.product-includes {
    margin-bottom: 32px;
}

.product-includes h4 {
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.product-includes ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.product-includes li {
    padding-left: 20px;
    position: relative;
    font-size: 0.9rem;
    color: var(--color-text);
}

.product-includes li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
}

/* ===================================================================
   PROTOCOL SECTION
   =================================================================== */
.section-protocol {
    background: var(--color-primary);
    color: var(--color-white);
}

.section-protocol .section-tag {
    color: var(--color-accent);
}

.section-protocol .section-title {
    color: var(--color-white);
}

.section-protocol .section-desc {
    color: rgba(255, 255, 255, 0.7);
}

.protocol-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.protocol-timeline::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent), rgba(232, 119, 46, 0.15));
}

.protocol-step {
    display: flex;
    gap: 32px;
    margin-bottom: 48px;
    position: relative;
}

.protocol-step:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(232, 119, 46, 0.15);
    border: 2px solid var(--color-accent);
    box-shadow: 0 0 20px rgba(232, 119, 46, 0.15), inset 0 0 15px rgba(201, 168, 76, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    position: relative;
    z-index: 2;
}

.step-content h3 {
    font-size: 1.3rem;
    color: var(--color-white);
    margin-bottom: 8px;
    font-family: var(--font-sans);
    font-weight: 700;
}

.step-content p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.step-detail {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.detail-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(232, 119, 46, 0.12);
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent-light);
}

.protocol-note {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: rgba(232, 119, 46, 0.08);
    border: 1px solid rgba(201, 168, 76, 0.25);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-top: 48px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.protocol-note svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    color: var(--color-accent);
}

.protocol-note p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* ===================================================================
   ADVANTAGES SECTION
   =================================================================== */
.section-advantages {
    background: var(--color-off-white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--color-white);
    padding: 36px 28px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.advantage-featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px 40px;
    padding: 48px 40px;
    background: linear-gradient(135deg, var(--color-primary), #2d1f14);
    color: var(--color-white);
    border: 1px solid rgba(201, 168, 76, 0.25) !important;
}

.advantage-featured:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 60px rgba(232, 119, 46, 0.15);
    border-color: rgba(201, 168, 76, 0.4) !important;
}

.advantage-header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 16px;
}

.flag-badge {
    display: flex;
    width: 48px;
    height: 32px;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.flag-stripe {
    flex: 1;
}

.flag-green { background: #009246; }
.flag-white { background: #fff; }
.flag-red { background: #CE2B37; }

.advantage-featured h3 {
    font-size: 1.6rem;
    color: var(--color-white);
    margin: 0;
}

.advantage-featured p {
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
}

.advantage-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.advantage-list li {
    padding-left: 24px;
    position: relative;
    font-size: 0.92rem;
    color: rgba(255, 255, 255, 0.85);
}

.advantage-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
}

.advantage-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
}

.advantage-icon svg {
    width: 100%;
    height: 100%;
    color: var(--color-accent);
}

.advantage-card:not(.advantage-featured) h3 {
    font-size: 1.15rem;
    color: var(--color-primary);
    margin-bottom: 12px;
    font-family: var(--font-sans);
    font-weight: 700;
}

.advantage-card:not(.advantage-featured) p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===================================================================
   APPLICATIONS SECTION
   =================================================================== */
.section-applications {
    background: var(--color-white);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.app-card {
    padding: 36px 28px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-light-gray);
    transition: var(--transition);
    text-align: center;
}

.app-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-6px);
    box-shadow: 0 8px 32px rgba(232, 119, 46, 0.12);
}

.app-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: var(--color-accent);
}

.app-icon svg {
    width: 100%;
    height: 100%;
}

.app-card h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 10px;
    font-family: var(--font-sans);
    font-weight: 700;
}

.app-card p {
    font-size: 0.88rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* Treatment Protocol Summary */
.treatment-protocol-summary {
    background: var(--color-off-white);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
}

.treatment-protocol-summary h3 {
    font-size: 1.4rem;
    color: var(--color-primary);
    margin-bottom: 32px;
}

.protocol-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.proto-card {
    padding: 32px 20px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.proto-number {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.proto-label {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.proto-detail {
    font-size: 0.82rem;
    color: var(--color-text-light);
}

/* ===================================================================
   CTA BANNER
   =================================================================== */
.cta-banner {
    background:
        linear-gradient(135deg, rgba(26, 20, 16, 0.96), rgba(45, 31, 20, 0.96));
    padding: 80px 0;
    border-top: 2px solid rgba(201, 168, 76, 0.2);
    border-bottom: 2px solid rgba(201, 168, 76, 0.2);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--color-white);
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 36px;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================================================
   CONTACT SECTION
   =================================================================== */
.section-contact {
    background: var(--color-off-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: rgba(232, 119, 46, 0.1);
    border: 1px solid rgba(201, 168, 76, 0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
    color: var(--color-accent);
}

.contact-item h4 {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.92rem;
    color: var(--color-text-light);
}

.contact-certs {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--color-light-gray);
}

.contact-certs h4 {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.cert-badges {
    display: flex;
    gap: 12px;
}

.cert-badge {
    flex: 1;
    padding: 16px;
    background: var(--color-white);
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--color-light-gray);
}

.cert-badge strong {
    display: block;
    font-size: 0.85rem;
    color: var(--color-primary);
    margin-bottom: 2px;
}

.cert-badge span {
    font-size: 0.72rem;
    color: var(--color-text-light);
}

/* Contact Form */
.contact-form {
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(201, 168, 76, 0.15);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 6px;
    letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--color-light-gray);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.92rem;
    color: var(--color-text);
    transition: var(--transition);
    background: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(232, 119, 46, 0.12);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b6b6b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

/* ===================================================================
   FOOTER
   =================================================================== */
.footer {
    background: var(--color-primary);
    padding: 64px 0 32px;
    color: rgba(255, 255, 255, 0.7);
    border-top: 2px solid rgba(201, 168, 76, 0.15);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.7;
    max-width: 320px;
}

.footer-links h4 {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 8px;
}

.footer-disclaimer {
    max-width: 700px;
    margin: 0 auto;
    font-size: 0.72rem !important;
    line-height: 1.6;
}

/* ===================================================================
   RESPONSIVE DESIGN
   =================================================================== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-content-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .product-showcase {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantage-featured {
        grid-column: 1 / -1;
    }

    .applications-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(26, 20, 16, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 16px;
        z-index: 999;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-link {
        font-size: 1.2rem;
        padding: 12px 24px;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .section {
        padding: 72px 0;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .tech-tab-buttons {
        flex-direction: column;
    }

    .product-specs {
        grid-template-columns: 1fr;
    }

    .protocol-timeline::before {
        display: none;
    }

    .protocol-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 16px;
    }

    .step-number {
        width: 64px;
        height: 64px;
        font-size: 1.2rem;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .advantage-featured {
        grid-template-columns: 1fr;
        padding: 32px 24px;
    }

    .applications-grid {
        grid-template-columns: 1fr;
    }

    .protocol-cards {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-form {
        padding: 28px 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .cert-badges {
        flex-direction: column;
    }

    .hero-features {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-scroll {
        display: none;
    }

    .tech-process-flow {
        flex-direction: column;
    }

    .process-arrow {
        transform: rotate(90deg);
    }

    .treatment-protocol-summary {
        padding: 32px 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.88rem;
    }

    .btn-lg {
        padding: 14px 28px;
    }
}

/* ===================================================================
   UTILITY ANIMATIONS
   =================================================================== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Smooth loading */
body {
    opacity: 0;
    animation: pageLoad 0.6s ease-out forwards;
}

@keyframes pageLoad {
    to { opacity: 1; }
}