/**
 * Curecarb Website Styles
 * Inspired by modern, premium design with dark theme
 */

/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */
:root {
    /* Colors - Black and Gold Theme */
    --color-primary: #FFB400;
    --color-secondary: #cca300;
    --color-accent: #ffd700;
    --color-bg-dark: #000000;
    --color-bg-darker: #0a0a0a;
    --color-bg-light: #1a1a1a;
    --color-text-primary: #ffffff;
    --color-text-secondary: #d4d4d4;
    --color-text-muted: #888888;
    --color-border: #2a2a2a;
    --color-glow: rgba(255, 180, 0, 0.5);

    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --font-size-small: 0.875rem;
    --font-size-large: 1.125rem;
    --font-size-h1: 4rem;
    --font-size-h2: 3rem;
    --font-size-h3: 2rem;
    --font-size-h4: 1.5rem;
    --font-size-h5: 1.25rem;
    --font-size-h6: 1rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;

    /* Layout */
    --container-max-width: 1400px;
    --container-padding: 2rem;
    --header-height: 80px;
    --border-radius: 8px;
    --border-radius-large: 16px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index */
    --z-header: 1000;
    --z-nav-overlay: 2000;
    --z-scroll-top: 999;
    --z-glow-border: 10;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ========================================
   Typography
   ======================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

h4 {
    font-size: var(--font-size-h4);
}

h5 {
    font-size: var(--font-size-h5);
}

h6 {
    font-size: var(--font-size-h6);
}

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--color-secondary);
}

/* ========================================
   Layout Components
   ======================================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ========================================
   Glowing Border Effect
   ======================================== */
.glow-border {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: var(--z-glow-border);
    border: 3px solid var(--color-primary);
    box-shadow:
        inset 0 0 20px var(--color-glow),
        0 0 20px var(--color-glow);
    animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {

    0%,
    100% {
        opacity: 0.6;
    }

    50% {
        opacity: 1;
    }
}

/* ========================================
   Header
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-header);
    border-bottom: 1px solid var(--color-border);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    transition: all var(--transition-fast);
}

.logo-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Menu Toggle Button */
.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: calc(var(--z-nav-overlay) + 1);
    position: relative;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 30px;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-normal);
}

.menu-toggle.active .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active .hamburger span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* ========================================
   Navigation Overlay
   ======================================== */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    z-index: var(--z-nav-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

.nav-overlay-content {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-lg) var(--spacing-md);
}

.nav-container {
    max-width: 800px;
    width: 100%;
}

.nav-menu {
    list-style: none;
}

.nav-item {
    margin-bottom: var(--spacing-md);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.nav-overlay.active .nav-item {
    opacity: 1;
    transform: translateY(0);
}

.nav-overlay.active .nav-item:nth-child(1) {
    transition-delay: 0.1s;
}

.nav-overlay.active .nav-item:nth-child(2) {
    transition-delay: 0.2s;
}

.nav-overlay.active .nav-item:nth-child(3) {
    transition-delay: 0.3s;
}

.nav-overlay.active .nav-item:nth-child(4) {
    transition-delay: 0.4s;
}

.nav-overlay.active .nav-item:nth-child(5) {
    transition-delay: 0.5s;
}

.nav-link {
    font-size: 2.5rem;
    font-weight: 700;
    color: #000;
    display: block;
    transition: all var(--transition-fast);
    position: relative;
    padding-left: 0;
}

.nav-link:hover {
    color: var(--color-primary);
    padding-left: 20px;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 3px;
    background: var(--color-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover::before {
    width: 10px;
}

.nav-submenu {
    list-style: none;
    margin-top: var(--spacing-sm);
    margin-left: var(--spacing-md);
    display: none;
}

.nav-item.has-submenu:hover .nav-submenu {
    display: block;
}

.nav-sublink {
    font-size: 1.25rem;
    font-weight: 400;
    color: #333;
    display: block;
    padding: var(--spacing-xs) 0;
    transition: all var(--transition-fast);
}

.nav-sublink:hover {
    color: var(--color-primary);
    padding-left: 10px;
}

.nav-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-md);
    border-top: 2px solid #e0e0e0;
}

.nav-contact-label {
    font-size: var(--font-size-small);
    color: #666;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.nav-contact-link {
    display: block;
    font-size: var(--font-size-large);
    color: #000;
    margin-bottom: var(--spacing-xs);
}

.nav-contact-link:hover {
    color: var(--color-primary);
}

/* ========================================
   Hero Section
   ======================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-xl) 0;
    margin-top: var(--header-height);
    background: linear-gradient(135deg, var(--color-bg-darker) 0%, var(--color-bg-dark) 100%);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-large);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-cta {
    display: inline-flex;
    gap: var(--spacing-sm);
}

.btn {
    padding: 1rem 2.5rem;
    font-size: var(--font-size-large);
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-bg-dark);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--color-glow);
}

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

.btn-outline:hover {
    background: var(--color-text-primary);
    color: var(--color-bg-dark);
}

/* Vertical Progress Indicator */
.vertical-progress {
    position: fixed;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.progress-item {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    padding-left: 30px;
}

.progress-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 2px;
    background: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.progress-item.active,
.progress-item:hover {
    color: var(--color-primary);
}

.progress-item.active::before,
.progress-item:hover::before {
    background: var(--color-primary);
    width: 30px;
}

/* ========================================
   Content Sections
   ======================================== */
.section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-large);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Accent Section */
.section-accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, #ff8c5a 100%);
    color: var(--color-bg-dark);
}

.section-accent .section-subtitle,
.section-accent .section-title,
.section-accent .section-description {
    color: var(--color-bg-dark);
}

/* ========================================
   Accordion Component
   ======================================== */
.accordion {
    max-width: 900px;
    margin: 0 auto;
}

.accordion-item {
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-md);
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.accordion-header:hover {
    color: var(--color-primary);
}

.accordion-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-right: var(--spacing-md);
    min-width: 60px;
}

.accordion-title {
    font-size: 1.5rem;
    font-weight: 600;
    flex: 1;
}

.accordion-icon {
    font-size: 2rem;
    transition: transform var(--transition-normal);
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
    padding-left: 76px;
}

.accordion-item.active .accordion-content {
    max-height: 500px;
    padding-bottom: var(--spacing-md);
}

.accordion-text {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ========================================
   Grid Layouts
   ======================================== */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Card Component */
.card {
    background: var(--color-bg-light);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: 0 10px 40px rgba(0, 255, 136, 0.2);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.card-title {
    font-size: var(--font-size-h4);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    background: var(--color-bg-darker);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-tagline {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-description {
    color: var(--color-text-muted);
    font-size: var(--font-size-small);
    line-height: 1.6;
}

.footer-title {
    font-size: var(--font-size-h5);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    margin-bottom: var(--spacing-sm);
}

.footer-contact a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
}

.footer-address {
    color: var(--color-text-muted);
    font-size: var(--font-size-small);
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-light);
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-bg-dark);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: var(--font-size-small);
}

/* ========================================
   Scroll to Top Button
   ======================================== */
.scroll-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-bg-dark);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-scroll-top);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--color-glow);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.fade-in-up {
    animation: fadeInUp 0.8s ease;
}

/* ========================================
   Form Styles
   ======================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
    font-weight: 500;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem;
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --font-size-h1: 3rem;
        --font-size-h2: 2.5rem;
        --font-size-h3: 1.75rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 6rem;
    }

    .vertical-progress {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-h1: 2.5rem;
        --font-size-h2: 2rem;
        --font-size-h3: 1.5rem;
        --container-padding: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }

    .nav-link {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-h1: 2rem;
        --font-size-h2: 1.75rem;
        --container-padding: 1rem;
    }

    .glow-border {
        border-width: 2px;
    }

    .nav-link {
        font-size: 1.5rem;
    }

    .accordion-content {
        padding-left: 0;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.pt-sm {
    padding-top: var(--spacing-sm);
}

.pt-md {
    padding-top: var(--spacing-md);
}

.pt-lg {
    padding-top: var(--spacing-lg);
}

.pb-sm {
    padding-bottom: var(--spacing-sm);
}

.pb-md {
    padding-bottom: var(--spacing-md);
}

.pb-lg {
    padding-bottom: var(--spacing-lg);
}