/* ============================================
   VULCA Grip Landing Page - Styles
   Modern, minimal, premium design
   ============================================ */

:root {
    /* Color Palette */
    --bg-primary: #1C1C1C;
    --accent: #FF5409;
    --text-primary: #E6E6E6;
    --text-secondary: rgba(230, 230, 230, 0.7);
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --nav-bg: rgba(28, 28, 28, 0.8);
    --nav-border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-fa: 'Vazirmatn', 'Tahoma', sans-serif;
    
    /* Spacing */
    --container-padding: 2rem;
    --section-spacing: 8rem;
    --card-radius: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

[dir="rtl"] body {
    font-family: var(--font-fa);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

[dir="rtl"] h1, [dir="rtl"] h2, [dir="rtl"] h3,
[dir="rtl"] h4, [dir="rtl"] h5, [dir="rtl"] h6 {
    letter-spacing: 0;
}

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--nav-border);
    transition: all var(--transition-base);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-logo-img {
    height: 70px;
    width: auto;
    object-fit: contain;
    display: block;
}

@media (max-width: 768px) {
    .nav-logo-img {
        height: 32px;
    }
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    position: relative;
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-secondary);
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform var(--transition-base);
    transform-origin: left;
}

[dir="rtl"] .nav-links a::after {
    transform-origin: right;
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
    transform: scaleX(1);
}

.lang-toggle {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.lang-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 0 4rem;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255, 84, 9, 0.08) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.hero-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    z-index: 1;
    position: relative;
}

@media (min-width: 968px) {
    .hero-wrapper {
        grid-template-columns: 1fr 1fr;
        gap: 6rem;
    }
}

.hero-content {
    text-align: center;
    z-index: 1;
    position: relative;
}

@media (min-width: 968px) {
    .hero-content {
        text-align: left;
    }
}

[dir="rtl"] .hero-content {
    text-align: right;
}

@media (min-width: 968px) {
    [dir="rtl"] .hero-content {
        text-align: right;
    }
}

.hero-image {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    min-height: 300px;
}

.product-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(255, 84, 9, 0.2));
    animation: float 6s ease-in-out infinite;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
    border-radius: 20px;
}

.product-image.loaded {
    opacity: 1;
    transform: translateY(0);
}

.hero-image::before {
    content: 'VULCA';
    position: absolute;
    color: var(--text-secondary);
    font-size: 3rem;
    font-weight: 700;
    opacity: 0.1;
    z-index: 0;
    pointer-events: none;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 300;
    line-height: 1.8;
}

.hero-subtitle p {
    margin: 0.5rem 0;
    font-size: inherit;
    color: inherit;
    font-weight: inherit;
}

.hero-subtitle p:first-child {
    margin-top: 0;
}

.hero-subtitle p:last-child {
    margin-bottom: 0;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.hero-cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-instagram {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
    text-align: center;
    margin: 0;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.hero-instagram:hover {
    color: var(--accent);
}

.hero-discount {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 84, 9, 0.1);
    border: 1px solid rgba(255, 84, 9, 0.3);
    border-radius: 12px;
    animation: pulseDiscount 2s ease-in-out infinite;
}

@keyframes pulseDiscount {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 84, 9, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(255, 84, 9, 0);
    }
}

.discount-badge {
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.05em;
}

.discount-code {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 600;
    font-family: 'Courier New', monospace;
    background: rgba(255, 84, 9, 0.15);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    letter-spacing: 0.1em;
}

/* Buttons */
.btn {
    padding: 1rem 2.5rem;
    border-radius: var(--card-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    display: inline-block;
    position: relative;
    overflow: hidden;
    font-family: inherit;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 84, 9, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 60px;
    overflow: hidden;
}

.scroll-line {
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, var(--accent));
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: translateY(-100%); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(100%); opacity: 0; }
}

/* Section Styles */
section {
    padding: var(--section-spacing) 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    text-align: center;
    margin-bottom: 4rem;
    font-weight: 600;
}

/* About Section */
.about {
    padding: var(--section-spacing) 0;
    background: rgba(255, 255, 255, 0.01);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .about-content {
        grid-template-columns: 1fr 1fr;
        gap: 6rem;
    }
}

.about-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.about-item.revealed {
    opacity: 1;
    transform: translateY(0);
}

.about-title {
    font-size: clamp(1.8rem, 3vw, 2.2rem);
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    font-weight: 300;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--card-radius);
    padding: 2.5rem;
    text-align: center;
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 10px 40px rgba(255, 84, 9, 0.1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
}

.feature-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Problem → Solution Section */
.problem-solution {
    background: rgba(255, 255, 255, 0.02);
}

.problem-solution-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    align-items: start;
}

@media (min-width: 968px) {
    .problem-solution-grid {
        grid-template-columns: 1fr auto 1fr;
        gap: 4rem;
    }
}

.problem-col,
.solution-col {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.problem-col.revealed,
.solution-col.revealed {
    opacity: 1;
    transform: translateY(0);
}

.problem-list,
.solution-list {
    list-style: none;
    margin-top: 2rem;
}

.problem-list li,
.solution-list li {
    padding: 1rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.8;
}

[dir="rtl"] .problem-list li,
[dir="rtl"] .solution-list li {
    padding-left: 0;
    padding-right: 2rem;
}

.problem-list li::before {
    content: '✕';
    position: absolute;
    left: 0;
    color: #ff4444;
    font-weight: bold;
}

.solution-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

[dir="rtl"] .problem-list li::before,
[dir="rtl"] .solution-list li::before {
    left: auto;
    right: 0;
}

.solution-divider {
    display: none;
    align-items: center;
    justify-content: center;
    position: relative;
}

@media (min-width: 968px) {
    .solution-divider {
        display: flex;
    }
}

.divider-line {
    width: 2px;
    height: 200px;
    background: linear-gradient(to bottom, transparent, var(--accent), transparent);
    position: relative;
    opacity: 0;
    transform: scaleY(0);
    transition: all var(--transition-slow);
}

.solution-divider.revealed .divider-line {
    opacity: 1;
    transform: scaleY(1);
}

/* Gallery Section */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--card-radius);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 1;
    opacity: 0;
    transform: scale(0.9);
    transition: all var(--transition-base);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-item::before {
    content: 'VULCA';
    position: absolute;
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 600;
    opacity: 0.3;
    z-index: 0;
}

.gallery-item.revealed {
    opacity: 1;
    transform: scale(1);
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 40px rgba(255, 84, 9, 0.2);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
    position: relative;
    z-index: 1;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

/* Lightbox Modal */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--card-radius);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2001;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.1);
}

.lightbox-close {
    top: 2rem;
    right: 2rem;
}

[dir="rtl"] .lightbox-close {
    right: auto;
    left: 2rem;
}

.lightbox-prev {
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

[dir="rtl"] .lightbox-prev {
    left: auto;
    right: 2rem;
}

.lightbox-next {
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

[dir="rtl"] .lightbox-next {
    right: auto;
    left: 2rem;
}

/* FAQ Section */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--card-radius);
    margin-bottom: 1rem;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.faq-item.revealed {
    opacity: 1;
    transform: translateY(0);
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
    transition: color var(--transition-fast);
}

[dir="rtl"] .faq-question {
    text-align: right;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent);
    transition: transform var(--transition-base);
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 500px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Contact Section */
.contact {
    text-align: center;
    padding-bottom: 4rem;
}

.contact-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-instagram {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent);
    padding: 1rem 2rem;
    border: 2px solid var(--accent);
    border-radius: var(--card-radius);
    transition: all var(--transition-base);
    margin-bottom: 4rem;
    text-decoration: none;
}

.contact-instagram:hover {
    background: var(--accent);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 84, 9, 0.3);
}

.contact-instagram:hover .instagram-icon {
    stroke: var(--bg-primary);
}

.instagram-icon {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    flex-shrink: 0;
    transition: stroke var(--transition-base);
}

.contact-partnership {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: 0.875rem 1.75rem;
    border: 2px solid var(--card-border);
    border-radius: var(--card-radius);
    transition: all var(--transition-base);
    margin-top: 1.5rem;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.02);
}

.contact-partnership:hover {
    border-color: #25D366;
    background: rgba(37, 211, 102, 0.1);
    color: #25D366;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.2);
}

.contact-partnership:hover .whatsapp-icon {
    stroke: #25D366;
}

.whatsapp-icon {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    flex-shrink: 0;
    transition: stroke var(--transition-base);
}

.footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    :root {
        --section-spacing: 5rem;
        --container-padding: 1.5rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .nav-links a {
        font-size: 0.85rem;
    }
    
    .hero-cta-buttons {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    
    .hero-cta-buttons .btn {
        width: 100%;
        text-align: center;
    }
    
    .hero-instagram {
        width: 100%;
        text-align: center;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .lightbox-close {
        top: 1rem;
        right: 1rem;
    }
    
    [dir="rtl"] .lightbox-close {
        left: 1rem;
        right: auto;
    }
}