/* ============================================
   style.css — eRGiss Software website
   @author Claude Code
   @version 1.0
   ============================================ */

/* --- Custom Properties --- */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-accent: #2563eb;
    --color-hero-from: #0a1628;
    --color-hero-to: #1a2a4a;
    --color-dark: #0f172a;
    --color-dark-card: #1e293b;
    --color-text: #334155;
    --color-text-light: #64748b;
    --color-text-white: #f1f5f9;
    --color-bg-light: #ffffff;
    --color-bg-gray: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-border: #e2e8f0;
    --color-planned-border: #f59e0b;
    --color-planned-bg: #fffbeb;
    --color-planned-badge: #d97706;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --nav-height: 72px;
    --container-max: 1200px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-card-hover: 0 12px 40px rgba(37,99,235,0.15);
    --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;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--color-primary-dark);
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: background var(--transition), box-shadow var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 8px rgba(0,0,0,0.08);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}

.navbar.scrolled .nav-logo {
    color: var(--color-dark);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 1rem;
}

.logo-text {
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--color-primary);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 4px;
}

.nav-link {
    display: inline-block;
    padding: 8px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.navbar.scrolled .nav-link {
    color: var(--color-text);
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(255,255,255,0.1);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--color-primary);
    background: rgba(37,99,235,0.08);
}

.nav-link-cta {
    background: var(--color-primary) !important;
    color: #fff !important;
    margin-left: 8px;
}

.nav-link-cta:hover {
    background: var(--color-primary-dark) !important;
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.navbar.scrolled .nav-toggle span {
    background: var(--color-dark);
}

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

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, var(--color-hero-from) 0%, var(--color-hero-to) 50%, #0f2557 100%);
    z-index: -2;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(37,99,235,0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(37,99,235,0.1) 0%, transparent 40%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    padding: 120px 24px 80px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    color: #fff;
    letter-spacing: -1.5px;
    line-height: 1.1;
    margin-bottom: 20px;
}

.text-accent {
    color: var(--color-primary-light);
}

.hero-tagline {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: rgba(255,255,255,0.9);
    font-weight: 500;
    margin-bottom: 12px;
}

.hero-subtitle {
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: rgba(255,255,255,0.6);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.hero-domains {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.domain-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 100px;
    color: rgba(255,255,255,0.5);
    font-size: 0.8rem;
    font-weight: 500;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

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

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.35);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* --- Sections --- */
.section {
    padding: 100px 0;
}

.section-light {
    background: var(--color-bg-light);
}

.section-gray {
    background: var(--color-bg-gray);
}

.section-dark {
    background: var(--color-bg-dark);
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.section-label-light {
    color: var(--color-primary-light);
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--color-dark);
    letter-spacing: -0.5px;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-title-light {
    color: #fff;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

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

.stat-card {
    text-align: center;
    padding: 32px 16px;
    background: var(--color-bg-gray);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    display: inline;
}

.stat-suffix {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    display: inline;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 8px;
    font-weight: 500;
}

/* --- Product Cards --- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.card {
    position: relative;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.section-gray .card {
    background: #fff;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(37,99,235,0.08);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 1.25rem;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
    line-height: 1.3;
}

.card-text {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.65;
}

/* --- Card Details (expandable) --- */
.card-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease, margin 0.3s ease;
    opacity: 0;
    margin-top: 0;
}

.card-details.open {
    max-height: 600px;
    opacity: 1;
    margin-top: 12px;
}

.card-details ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.card-details li {
    position: relative;
    padding: 5px 0 5px 20px;
    font-size: 0.83rem;
    color: var(--color-text-light);
    line-height: 1.5;
    border-bottom: 1px solid rgba(0,0,0,0.04);
}

.card-details li:last-child {
    border-bottom: none;
}

.card-details li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 0.7rem;
    top: 8px;
}

.card-details li strong {
    color: var(--color-text);
}

.btn-details {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(37,99,235,0.08);
    border: 1px solid rgba(37,99,235,0.2);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-details:hover {
    background: rgba(37,99,235,0.15);
    border-color: var(--color-primary);
}

.btn-details.open {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-details .fa-chevron-right {
    transition: transform 0.3s ease;
    font-size: 0.7rem;
}

.btn-details.open .fa-chevron-right {
    transform: rotate(90deg);
}

/* --- Planned Cards --- */
.card-planned {
    border: 2px dashed var(--color-planned-border);
    background: var(--color-planned-bg);
}

.card-planned:hover {
    box-shadow: 0 12px 40px rgba(245,158,11,0.15);
}

.card-planned .card-icon {
    background: rgba(245,158,11,0.12);
    color: var(--color-planned-badge);
}

.badge-planned {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--color-planned-badge);
    color: #fff;
    border-radius: 100px;
}

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

.portfolio-card {
    background: var(--color-bg);
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.portfolio-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37,99,235,0.08);
    color: var(--color-primary);
    border-radius: 10px;
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.portfolio-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.portfolio-card p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.portfolio-stats {
    list-style: none;
    padding: 0;
    margin: 0;
}

.portfolio-stats li {
    padding: 6px 0;
    font-size: 0.85rem;
    color: var(--color-text-light);
    border-bottom: 1px solid rgba(0,0,0,0.04);
}

.portfolio-stats li:last-child {
    border-bottom: none;
}

.portfolio-stats strong {
    color: var(--color-primary);
    font-size: 1.1rem;
    margin-right: 4px;
}

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

.advantage-card {
    text-align: center;
    padding: 36px 24px;
    background: var(--color-dark-card);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.06);
    transition: transform var(--transition), border-color var(--transition);
}

.advantage-card:hover {
    transform: translateY(-4px);
    border-color: rgba(37,99,235,0.3);
}

.advantage-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    background: rgba(37,99,235,0.15);
    color: var(--color-primary-light);
    border-radius: var(--radius);
    font-size: 1.4rem;
}

.advantage-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.advantage-card p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.6;
}

/* --- Tech Grid --- */
.tech-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 24px;
    min-width: 100px;
    border-radius: var(--radius);
    transition: background var(--transition);
}

.tech-item:hover {
    background: var(--color-bg-gray);
}

.tech-item i {
    font-size: 2.5rem;
    color: var(--color-text-light);
    transition: color var(--transition);
}

.tech-item:hover i {
    color: var(--color-primary);
}

.tech-item span {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-light);
}

/* --- Contact --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item i {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37,99,235,0.08);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-item div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.contact-item strong {
    font-size: 0.9rem;
    color: var(--color-dark);
}

.contact-item a,
.contact-item span {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.contact-domains {
    margin-top: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.contact-domains h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.contact-domains a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.contact-domains a:hover {
    color: var(--color-primary);
}

/* --- Form --- */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: #fff;
    padding: 36px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-dark);
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    font-family: var(--font-family);
    font-size: 0.95rem;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-gray);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
    background: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* --- Footer --- */
.footer {
    background: var(--color-dark);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand p {
    margin-top: 16px;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
    max-width: 320px;
}

.footer-brand .nav-logo {
    color: #fff;
}

.footer-links h4 {
    font-size: 0.85rem;
    font-weight: 700;
    color: rgba(255,255,255,0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.footer-links a {
    display: block;
    padding: 5px 0;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.45);
    transition: color var(--transition);
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.35);
}

/* --- Animations --- */
.js-loaded .animate-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.js-loaded .animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 32px 24px;
        gap: 4px;
        transform: translateX(100%);
        transition: transform var(--transition);
        overflow-y: auto;
    }

    .nav-menu.open {
        transform: translateX(0);
    }

    .nav-menu .nav-link {
        color: var(--color-text);
        font-size: 1rem;
        padding: 12px 16px;
    }

    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        color: var(--color-primary);
        background: rgba(37,99,235,0.06);
    }

    .nav-menu .nav-link-cta {
        color: #fff !important;
        margin-left: 0;
        margin-top: 16px;
        text-align: center;
        justify-content: center;
    }

    .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);
    }

    .section {
        padding: 72px 0;
    }

    .hero-content {
        padding: 100px 16px 60px;
    }

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

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

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

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

    .tech-grid {
        gap: 16px;
    }

    .tech-item {
        padding: 16px;
        min-width: 80px;
    }

    .tech-item i {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .hero-domains {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }

    .stat-number {
        font-size: 2.25rem;
    }

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