/* ============================================================
   Mastermind Group Ventures — Stylesheet
   Version: 1.0
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
    --bg-primary: #0f172a;
    --bg-surface: #1e293b;
    --bg-card: #1e293b;
    --bg-card-border: rgba(148, 163, 184, 0.12);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-subtle: rgba(59, 130, 246, 0.1);
    --badge-coming-soon-bg: rgba(245, 158, 11, 0.15);
    --badge-coming-soon-text: #fbbf24;
    --badge-active-bg: rgba(34, 197, 94, 0.15);
    --badge-active-text: #4ade80;
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --nav-height: 72px;
    --max-width: 1120px;
    --transition-speed: 250ms;
    --transition-ease: 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);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-ease);
}

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

a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
}

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


/* ---------- Navigation ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background-color: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--bg-card-border);
    transition: background-color var(--transition-speed) var(--transition-ease);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text-primary);
    text-decoration: none;
}

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

.nav-menu {
    list-style: none;
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 4px 0;
    position: relative;
    transition: color var(--transition-speed) var(--transition-ease);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width var(--transition-speed) var(--transition-ease);
}

.nav-link:hover,
.nav-link.active { color: var(--text-primary); }

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

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

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-speed) var(--transition-ease),
                opacity var(--transition-speed) var(--transition-ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero Section ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        var(--bg-primary);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.hero-content {
    max-width: 720px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-tagline {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 32px;
    letter-spacing: 0.01em;
}

.hero-body {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-cta {
    display: inline-block;
    padding: 14px 36px;
    font-size: 0.95rem;
    font-weight: 600;
    color: #ffffff;
    background-color: var(--accent);
    border-radius: 6px;
    text-decoration: none;
    transition: background-color var(--transition-speed) var(--transition-ease),
                transform var(--transition-speed) var(--transition-ease);
}

.hero-cta:hover {
    background-color: var(--accent-hover);
    color: #ffffff;
    transform: translateY(-1px);
}

.hero-cta:active { transform: translateY(0); }

/* ---------- Sections ---------- */
.section { padding: 100px 24px; }
.section--alt { background-color: var(--bg-surface); }

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.section-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 780px;
    margin-bottom: 56px;
}

/* ---------- Card Grid ---------- */
.card-grid { display: grid; gap: 24px; }
.card-grid--four { grid-template-columns: 1fr; }
.card-grid--two { grid-template-columns: 1fr; }

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 10px;
    padding: 32px;
    transition: transform var(--transition-speed) var(--transition-ease),
                box-shadow var(--transition-speed) var(--transition-ease),
                border-color var(--transition-speed) var(--transition-ease);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    border-color: rgba(59, 130, 246, 0.25);
}

.card-icon { color: var(--accent); margin-bottom: 20px; }

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.card-body {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* ---------- Venture Cards ---------- */
.venture-card .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}
.venture-card .card-title { margin-bottom: 0; }
.venture-card .card-footnote {
    margin-top: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.venture-media {
    margin-top: 20px;
    border-radius: 8px;
    overflow: hidden;
}

/* ---------- Badges ---------- */
.badge {
    display: inline-block;
    padding: 4px 14px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    border-radius: 20px;
    white-space: nowrap;
}
.badge--coming-soon {
    background-color: var(--badge-coming-soon-bg);
    color: var(--badge-coming-soon-text);
}
.badge--active {
    background-color: var(--badge-active-bg);
    color: var(--badge-active-text);
}

/* ---------- About Section ---------- */
.about-content { max-width: 780px; }
.about-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}
.about-content p:last-child { margin-bottom: 0; }

/* ---------- Contact Section ---------- */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}
.contact-body {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 32px;
}
.contact-email {
    display: inline-block;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--accent);
    padding: 12px 0;
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition-speed) var(--transition-ease),
                color var(--transition-speed) var(--transition-ease);
}
.contact-email:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent-hover);
}
.contact-location {
    margin-top: 20px;
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* ---------- Footer ---------- */
.site-footer {
    padding: 40px 24px;
    border-top: 1px solid var(--bg-card-border);
    text-align: center;
}
.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
}
.footer-copyright {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.footer-legal {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ---------- Fade-In Animation ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--transition-ease),
                transform 0.6s var(--transition-ease);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

/* Tablet: 768px+ */
@media (min-width: 768px) {
    .hero-title { font-size: 4rem; }
    .hero-tagline { font-size: 1.4rem; }
    .section { padding: 120px 40px; }
    .card-grid--four { grid-template-columns: repeat(2, 1fr); }
    .card-grid--two { grid-template-columns: repeat(2, 1fr); }
    .section-title { font-size: 2.5rem; }
}

/* Desktop: 1024px+ */
@media (min-width: 1024px) {
    .hero-title { font-size: 4.5rem; }
    .card-grid--four { grid-template-columns: repeat(4, 1fr); }
}

/* Mobile: below 768px */
@media (max-width: 767px) {
    .nav-toggle { display: flex; }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0; right: 0; bottom: 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 40px;
        background-color: rgba(15, 23, 42, 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-speed) var(--transition-ease),
                    visibility var(--transition-speed) var(--transition-ease);
    }
    .nav-menu.open { opacity: 1; visibility: visible; }
    .nav-link { font-size: 1.25rem; }

    .hero { min-height: 90vh; padding: 100px 20px 60px; }
    .hero-title { font-size: 2.25rem; }
    .hero-tagline { font-size: 1.1rem; }
    .hero-body { font-size: 1rem; }

    .section { padding: 80px 20px; }
    .section-title { font-size: 1.75rem; }
    .contact-email { font-size: 1.1rem; }
}