/* ==========================================
   StudioMemory — Shared Site CSS
   Nav, hamburger menu, mobile overlay, and
   color variables used on every page.
   Page-specific layout stays in each page's
   own inline <style> block.
   ========================================== */

html {
    scrollbar-gutter: stable;
}

/* Used by nav.js and script.js to lock background scroll while an
   overlay (mobile menu / lightbox) is open, instead of inline styles. */
body.scroll-locked {
    overflow: hidden;
}

:root {
    --apple-blue: #0071e3;
    --text-main: #1d1d1f;
    --text-secondary: #86868b;
    --bg-light: #f5f5f7;
    --border-color: #d2d2d7;
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 10%;
    height: 48px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    font-size: 19px;
    transition: opacity 0.2s ease;
}

.logo-container:hover {
    opacity: 0.7;
    text-decoration: none;
}

.logo-img {
    width: 32px;
    height: 32px;
    border-radius: 7px;
    object-fit: cover;
}

/* Desktop Navigation Links */
.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 14px;
    font-weight: 500;
    opacity: 0.6; /* Mutes inactive links */
    transition: opacity 0.2s ease;
}

/* Light up links on hover or if it is the current page */
.nav-links a:hover,
.nav-links a.current {
    opacity: 1;
    text-decoration: none;
}

/* Hamburger Menu Toggle Button */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 22px;
    height: 16px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-main);
    transition: transform 0.25s ease, opacity 0.25s ease;
    transform-origin: left center;
}

/* Mobile Responsive Navigation Overlay */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        display: flex;
        flex-direction: column;
        gap: 0;
        position: fixed;
        top: 48px;
        left: 0;
        width: 100%;
        height: 0;
        background-color: #ffffff;
        opacity: 0;
        visibility: hidden;
        overflow: hidden;
        transition: height 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    }

    .nav-links a {
        width: 100%;
        padding: 20px 10%;
        font-size: 18px;
        font-weight: 500;
        border-bottom: 1px solid var(--border-color);
        box-sizing: border-box;
    }

    .nav-links.active {
        height: calc(100vh - 48px);
        opacity: 1;
        visibility: visible;
    }

    /* Morph bars into an 'X' symbol */
    .menu-toggle.open .hamburger-bar:nth-child(1) {
        transform: rotate(45deg) translate(1px, -1px);
    }
    .menu-toggle.open .hamburger-bar:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }
    .menu-toggle.open .hamburger-bar:nth-child(3) {
        transform: rotate(-45deg) translate(1px, 1px);
    }
}

/* Shared footer link styling (layout/spacing of the footer container
   stays page-specific, since footer structure differs by page) */
.footer-nav a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 12px;
    font-weight: 400;
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.footer-nav a:hover,
.footer-nav a.current {
    opacity: 1;
    text-decoration: none;
}

/* Native Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --apple-blue: #2997ff;
        --text-main: #f5f5f7;
        --text-secondary: #86868b;
        --bg-light: #1c1c1e;
        --border-color: #424245;
    }

    nav {
        background: rgba(0, 0, 0, 0.8);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}

@media (prefers-color-scheme: dark) and (max-width: 768px) {
    .nav-links {
        background-color: #000000;
    }
    .nav-links a {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}