/* ========================================
   Wise2C Website - Modern Tech Style
   ======================================== */

/* CSS Custom Properties */
:root {
    --color-bg: #0a0e17;
    --color-bg-secondary: #111827;
    --color-bg-card: #1a1f2e;
    --color-bg-card-hover: #222840;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-primary: #3b82f6;
    --color-primary-light: #60a5fa;
    --color-primary-dark: #2563eb;
    --color-accent: #06b6d4;
    --color-accent-green: #10b981;
    --color-gradient-start: #3b82f6;
    --color-gradient-end: #06b6d4;
    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.3s 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);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

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

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

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-img {
    height: 52px;
    width: auto;
    object-fit: contain;
    transition: opacity var(--transition);
}

.logo-img:hover {
    opacity: 0.85;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.logo-sub {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    border-radius: 1px;
    transition: width var(--transition);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.floating-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 8s infinite;
}

@keyframes particleFloat {
    0% { opacity: 0; transform: translateY(100vh) scale(0); }
    10% { opacity: 0.6; }
    90% { opacity: 0.6; }
    100% { opacity: 0; transform: translateY(-100px) scale(1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    padding-top: 80px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-title .line {
    display: block;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end), var(--color-accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-primary-dark));
    color: white;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(59, 130, 246, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border-hover);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-secondary);
    transform: translateY(-2px);
}

/* ========================================
   Section Common
   ======================================== */
.section {
    padding: 120px 0;
    position: relative;
}

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

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 520px;
    margin: 0 auto;
}

/* ========================================
   Products Grid
   ======================================== */
.products {
    background: var(--color-bg);
}

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

.product-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    opacity: 0;
    transition: opacity var(--transition);
}

.product-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.product-card:hover::before {
    opacity: 1;
}

.product-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary-light);
    margin-bottom: 20px;
}

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

.product-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary-light);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.product-tag.new {
    background: rgba(6, 182, 212, 0.1);
    color: var(--color-accent);
    border-color: rgba(6, 182, 212, 0.2);
    position: relative;
}

.product-tag.new::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    margin-right: 6px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.product-card.coming-soon {
    border-style: dashed;
}

.product-tag.open-source {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-accent-green);
    border-color: rgba(16, 185, 129, 0.2);
}

/* ========================================
   Blog Preview (Homepage)
   ======================================== */
.blog-preview {
    background: var(--color-bg-secondary);
}

.blog-preview-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.blog-preview-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 24px;
    background: var(--color-bg-card);
    transition: all var(--transition);
}

.blog-preview-item:hover {
    background: var(--color-bg-card-hover);
}

.blog-preview-category {
    flex-shrink: 0;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    background: rgba(6, 182, 212, 0.1);
    padding: 3px 10px;
    border-radius: 4px;
    width: 100px;
    text-align: center;
}

.blog-preview-title {
    flex: 1;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
    transition: color var(--transition);
}

.blog-preview-item:hover .blog-preview-title {
    color: var(--color-primary-light);
}

.blog-preview-date {
    flex-shrink: 0;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.blog-preview-more {
    text-align: center;
    margin-top: 36px;
}

@media (max-width: 768px) {
    .blog-preview-item {
        flex-wrap: wrap;
        gap: 8px;
        padding: 14px 16px;
    }

    .blog-preview-category {
        width: auto;
    }

    .blog-preview-title {
        order: 3;
        width: 100%;
        font-size: 0.9rem;
    }

    .blog-preview-date {
        margin-left: auto;
    }
}

/* ========================================
   Blog Page (blog.html)
   ======================================== */
.blog-page-header {
    padding: 140px 0 60px;
    background: var(--color-bg);
    text-align: center;
}

.blog-page-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.blog-page-desc {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.blog-page-content {
    background: var(--color-bg);
    padding: 0 0 100px;
}

.blog-article {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 40px;
    overflow: hidden;
    scroll-margin-top: 100px;
}

.blog-article-header {
    padding: 36px 48px 28px;
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.04), rgba(6, 182, 212, 0.02));
}

.blog-article-title {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.blog-article-body {
    padding: 36px 48px 40px;
    max-width: 820px;
}

.blog-article-body p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
}

.blog-article-body h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 36px 0 16px;
    padding-left: 14px;
    border-left: 3px solid var(--color-primary);
}

.blog-article-body ul {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
}

.blog-article-body ul li {
    font-size: 0.93rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    padding: 6px 0 6px 24px;
    position: relative;
}

.blog-article-body ul li::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary-light);
    opacity: 0.6;
}

.blog-article-body strong {
    color: var(--color-text);
    font-weight: 600;
}

.blog-article-author {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Blog page common elements */
.blog-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.blog-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    background: rgba(6, 182, 212, 0.1);
    padding: 3px 10px;
    border-radius: 4px;
}

.blog-date {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.blog-read-time {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    padding-left: 12px;
    border-left: 1px solid var(--color-border);
}

.blog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.blog-tag {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    padding: 2px 10px;
    border-radius: 20px;
}

@media (max-width: 768px) {
    .blog-page-header {
        padding: 110px 0 40px;
    }

    .blog-page-title {
        font-size: 1.8rem;
    }

    .blog-article-header {
        padding: 24px 20px 20px;
    }

    .blog-article-title {
        font-size: 1.2rem;
    }

    .blog-article-body {
        padding: 24px 20px 28px;
    }

    .blog-article-body h3 {
        font-size: 1.05rem;
    }
}

/* ========================================
   Clients Section
   ======================================== */
.clients {
    background: var(--color-bg);
    overflow: hidden;
}

.clients-marquee {
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    padding: 20px 0;
}

.marquee-track {
    display: flex;
    gap: 60px;
    animation: marquee 30s linear infinite;
    width: max-content;
}

.marquee-track:hover {
    animation-play-state: paused;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.client-logo {
    flex-shrink: 0;
    width: 140px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: grayscale(100%) brightness(0.7);
    opacity: 0.5;
    transition: all var(--transition);
}

.client-logo:hover {
    filter: grayscale(0%) brightness(1);
    opacity: 1;
}

.client-logo img {
    max-width: 120px;
    max-height: 48px;
    object-fit: contain;
}

/* ========================================
   Why Wise2C / About Section
   ======================================== */
.about {
    background: var(--color-bg-secondary);
}

.about-intro {
    max-width: 800px;
    margin: -28px auto 56px;
    text-align: center;
}

.about-intro p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.9;
}

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

.advantage-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    transition: all var(--transition);
    position: relative;
}

.advantage-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.advantage-icon {
    width: 44px;
    height: 44px;
    color: var(--color-primary-light);
    margin-bottom: 18px;
}

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

.advantage-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.advantage-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

@media (max-width: 1024px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

    .about-intro {
        margin-bottom: 36px;
    }
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: 40px 0;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.footer-brand .logo-text {
    font-size: 1.2rem;
}

.footer-logo-img {
    height: 44px;
    width: auto;
    object-fit: contain;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 28px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.icp-link {
    color: var(--color-text-muted);
    transition: color var(--transition);
}

.icp-link:hover {
    color: var(--color-text-secondary);
}

/* ========================================
   Scroll Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 32px;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        font-size: 1.2rem;
    }

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

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

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

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

    .hero-title {
        font-size: 2.2rem;
    }

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

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        text-align: center;
        justify-content: center;
    }

    .section {
        padding: 80px 0;
    }

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

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

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .client-logo {
        width: 100px;
    }

    .marquee-track {
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-content {
        padding-top: 60px;
    }

    .product-card {
        padding: 24px 20px;
    }

    .blog-card {
        padding: 24px;
    }
}