/* 
   HumanaBit | Premium B2B Modern Styles 
   -------------------------------------
*/

/* --- CSS Variables & Design System --- */
:root {
    /* Colors */
    --bg-color: #050b14;
    /* Deep rich dark background */
    --bg-color-lighter: #0a1122;
    /* Slightly lighter for sections */
    --panel-bg: rgba(13, 22, 43, 0.6);
    /* Glassmorphism panel bg */
    --panel-border: rgba(56, 189, 248, 0.15);
    /* Subtle cyber blue border */

    --text-main: #f1f5f9;
    /* Slate 100 */
    --text-muted: #94a3b8;
    /* Slate 400 */

    --accent: #38bdf8;
    /* Cyber/Electric Blue */
    --accent-hover: #0284c7;
    --accent-glow: rgba(56, 189, 248, 0.4);

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;

    /* Spacing & Utilities */
    --container-width: 1200px;
    --section-pad: 100px 0;

    /* Transitions */
    --trans-fast: 0.2s ease;
    --trans-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
}

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

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

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

h1,
h2,
h3,
h4 {
    line-height: 1.2;
    font-weight: 700;
}

.accent {
    color: var(--accent);
}

/* --- Layout Utilities --- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding {
    padding: var(--section-pad);
}

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

.mt-4 {
    margin-top: 2rem;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--trans-normal);
    border: 2px solid transparent;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.6);
}

.btn-outline {
    background-color: transparent;
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background-color: rgba(56, 189, 248, 0.05);
}

/* --- Glassmorphism Panels --- */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    transition: transform var(--trans-normal), box-shadow var(--trans-normal), border-color var(--trans-normal);
}

.glass-panel:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-color: rgba(56, 189, 248, 0.4);
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: background-color var(--trans-normal), padding var(--trans-normal), box-shadow var(--trans-normal);
}

.navbar.scrolled {
    background-color: rgba(5, 11, 20, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-text {
    color: var(--text-main);
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-main);
    position: absolute;
    transition: var(--trans-fast);
}

.mobile-menu-toggle span:nth-child(1) {
    top: 0;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 9px;
}

.mobile-menu-toggle span:nth-child(3) {
    top: 18px;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Gradient from dark bottom to slightly transparent top for readability */
    background: linear-gradient(to top, var(--bg-color) 0%, rgba(5, 11, 20, 0.8) 50%, rgba(5, 11, 20, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 800px;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

/* --- Shared Section Styles --- */
.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 4rem auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

/* --- About Section --- */
.about {
    background-color: var(--bg-color-lighter);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    text-align: left;
}

.feature-card {
    padding: 2.5rem 2rem;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* --- Magazines Section --- */
.magazines {
    background-color: var(--bg-color);
}

.magazines-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.magazine-card {
    position: relative;
    display: block;
    background: var(--panel-bg);
    border-radius: 12px;
    padding: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
    z-index: 1;
}

.magazine-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(56, 189, 248, 0.1) 0%, transparent 70%);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--trans-normal);
}

.magazine-card:hover .magazine-glow {
    opacity: 1;
}

.magazine-card:hover {
    border-color: rgba(56, 189, 248, 0.3);
    transform: translateY(-5px);
}

.magazine-tag {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 1rem;
    font-weight: 600;
}

.magazine-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.magazine-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.magazine-link {
    font-weight: 600;
    color: var(--accent);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
}

/* --- Events Section --- */
.events {
    background-color: var(--bg-color-lighter);
}

.events-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 4rem;
}

.events-header-text {
    max-width: 800px;
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.event-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.event-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.event-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--trans-normal);
}

.event-card:hover .event-image img {
    transform: scale(1.05);
}

.event-date {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background-color: var(--bg-color);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

.event-details {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.event-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.event-desc {
    color: var(--text-muted);
    margin-bottom: 2rem;
    flex-grow: 1;
}

.visible-mobile {
    display: none;
}

/* --- Footer --- */
.site-footer {
    background-color: #03060c;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 3fr 2fr 2fr 2fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-desc {
    color: var(--text-muted);
    margin-top: 1rem;
    font-size: 0.95rem;
    max-width: 300px;
}

.footer-title {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.95rem;
}

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

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --- Scroll to Top Button --- */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--panel-border);
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--trans-normal), visibility var(--trans-normal), transform var(--trans-normal), background-color var(--trans-fast), border-color var(--trans-fast);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

/* --- Animations --- */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* --- Responsive --- */
@media (max-width: 992px) {

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

    .hero-title {
        font-size: 3.5rem;
    }

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

@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-color-lighter);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: clip-path 0.3s ease-in-out;
    }

    .nav-menu.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    .mobile-menu-toggle {
        display: block;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

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

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.8rem;
    }

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

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

    .events-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .hidden-mobile {
        display: none;
    }

    .visible-mobile {
        display: block;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}