/* ==========================================================================
   Christopher Peterson Portfolio - Sidebar Layout
   ========================================================================== */

:root {
    --bg: #0b0f10;
    --bg-side: #0f1415;
    --bg-card: #141b1c;
    --line: #222d2e;
    --text: #f2f2f5;
    --muted: #9a9aa6;
    --accent: #19e3c1;
    --accent-2: #b6f23c;
    --grad: linear-gradient(135deg, var(--accent), var(--accent-2));
    --side-w: 300px;
    --font-body: 'Inter', -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-head: 'Space Grotesk', 'Inter', sans-serif;
    --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
code { background: #1f1f26; padding: 2px 6px; border-radius: 4px; font-size: .9em; }

/* ---------- Layout ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--side-w);
    height: 100vh;
    background:
        radial-gradient(420px 260px at 0% 0%, rgba(25,227,193,.14), transparent 70%),
        var(--bg-side);
    border-right: 1px solid var(--line);
    overflow-y: auto;
    z-index: 1000;
    scrollbar-width: thin;
    scrollbar-color: #2b2b33 transparent;
}
.sidebar::before {          /* accent edge */
    content: '';
    position: absolute; top: 0; left: 0;
    width: 3px; height: 100%;
    background: var(--grad);
}
.sidebar-inner {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    padding: 42px 30px 28px 34px;
}

.content {
    margin-left: var(--side-w);
    width: calc(100% - var(--side-w));
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---------- Brand ---------- */
.brand { display: block; margin-bottom: 38px; }
.brand-name {
    display: block;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 2rem;
    line-height: 1.08;
    letter-spacing: -.02em;
}
.brand-tag {
    display: inline-block;
    margin-top: 12px;
    font-size: .72rem;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--muted);
    padding-top: 12px;
    border-top: 2px solid transparent;
    border-image: var(--grad) 1;
}

/* ---------- Sidebar nav ---------- */
.side-nav { flex: 1; }
.side-heading {
    margin: 26px 0 8px;
    font-size: .68rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: #62626e;
    font-weight: 600;
}
.side-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    margin-left: -12px;
    border-radius: 8px;
    color: #c4c4cc;
    font-size: .95rem;
    font-weight: 500;
    transition: background .2s, color .2s, transform .2s;
}
.side-link i { width: 16px; text-align: center; color: var(--muted); font-size: .85rem; transition: color .2s; }
.side-link.sub { font-size: .9rem; font-weight: 400; padding: 6px 12px; }
.side-link:hover { background: rgba(255,255,255,.05); color: #fff; transform: translateX(3px); }
.side-link:hover i { color: var(--accent); }
.side-link.active { color: #fff; background: rgba(25,227,193,.12); font-weight: 600; }
.side-link.active i { color: var(--accent); }
.side-link.active::before {
    content: '';
    position: absolute; left: 0; top: 18%;
    width: 3px; height: 64%;
    border-radius: 3px;
    background: var(--grad);
}

/* ---------- Sidebar socials ---------- */
.side-socials {
    display: flex; gap: 10px;
    margin-top: 30px; padding-top: 22px;
    border-top: 1px solid var(--line);
}
.social-icon-btn {
    width: 40px; height: 40px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: #1e1e25;
    border: 1px solid var(--line);
    color: #fff;
    font-size: 1rem;
    transition: transform .25s, background .25s, border-color .25s;
}
.social-icon-btn:hover { background: var(--grad); border-color: transparent; transform: translateY(-3px); }

/* ---------- Page chrome ---------- */
.page {
    flex: 1;
    padding: 56px 56px 40px;
    max-width: 1500px;
    width: 100%;
    animation: pageIn .5s ease both;
}
@keyframes pageIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.page-head { margin-bottom: 40px; }
.eyebrow {
    font-size: .75rem;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 8px;
}
.page-title {
    font-family: var(--font-head);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -.03em;
    line-height: 1.1;
}
.page-title::after {
    content: '';
    display: block;
    width: 56px; height: 4px;
    margin-top: 16px;
    border-radius: 4px;
    background: var(--grad);
}
.page-desc { margin-top: 16px; color: var(--muted); max-width: 640px; }

.site-footer {
    padding: 24px 56px;
    border-top: 1px solid var(--line);
    color: #62626e;
    font-size: .8rem;
}

.empty-state { padding: 80px 0; color: var(--muted); }
.empty-state h2 { color: var(--text); margin-bottom: 8px; font-family: var(--font-head); }

/* ---------- Featured masonry ---------- */
.masonry { columns: 3; column-gap: 20px; }
.masonry-item {
    break-inside: avoid;
    margin-bottom: 20px;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--line);
    position: relative;
    animation: rise .6s ease both;
    animation-delay: calc(var(--i) * 60ms);
    transition: transform .3s, box-shadow .3s, border-color .3s;
}
.masonry-item img { display: block; width: 100%; height: auto; cursor: zoom-in; transition: transform .5s; }
.masonry-item:hover { transform: translateY(-5px); border-color: rgba(25,227,193,.5); box-shadow: 0 18px 40px rgba(0,0,0,.55); }
.masonry-item:hover img { transform: scale(1.04); }
@keyframes rise { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }

/* ---------- Project grid (4 across) ---------- */
.project-gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 56px;
}
.project-grid-item {
    position: relative;
    padding-top: 130%;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--line);
    cursor: zoom-in;
    animation: rise .6s ease both;
    animation-delay: calc(var(--i) * 45ms);
    transition: transform .3s, box-shadow .3s, border-color .3s;
}
.project-grid-item img {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .5s;
}
.project-grid-item::after {     /* hover glow */
    content: '\f00e';
    font-family: 'Font Awesome 6 Free'; font-weight: 900;
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; color: #fff;
    background: linear-gradient(to top, rgba(11,15,16,.75), rgba(11,15,16,.15));
    opacity: 0;
    transition: opacity .3s;
    pointer-events: none;
}
.project-grid-item:hover { transform: translateY(-5px); border-color: rgba(25,227,193,.5); box-shadow: 0 18px 40px rgba(0,0,0,.55); }
.project-grid-item:hover img { transform: scale(1.06); }
.project-grid-item:hover::after { opacity: 1; }

.project-nav-bar {
    display: flex; justify-content: space-between; gap: 16px;
    padding-top: 28px;
    border-top: 1px solid var(--line);
}
.project-nav-btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 11px 20px;
    border-radius: 30px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    font-weight: 500; font-size: .92rem;
    transition: border-color .25s, transform .25s, background .25s;
}
.project-nav-btn:hover { border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Bio ---------- */
.bio-content-grid {
    display: grid;
    grid-template-columns: minmax(240px, 380px) 1fr;
    gap: 56px;
    align-items: center;
    max-width: 1000px;
}
.bio-portrait-wrapper { position: relative; }
.bio-portrait-wrapper::before {
    content: '';
    position: absolute; inset: 14px -14px -14px 14px;
    border-radius: var(--radius);
    background: var(--grad);
    opacity: .55;
}
.bio-portrait { position: relative; width: 100%; display: block; border-radius: var(--radius); }
.bio-paragraph { font-size: 1.08rem; line-height: 1.85; color: #d4d4db; margin-bottom: 30px; }
.cta-button {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 30px;
    border-radius: 40px;
    background: var(--grad);
    color: #04140f;
    font-weight: 700;
    transition: transform .25s, box-shadow .25s;
}
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(25,227,193,.35); }

/* ---------- Contact ---------- */
.contact-section { max-width: 620px; }
.contact-form { display: flex; flex-direction: column; gap: 22px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-label { font-size: .9rem; font-weight: 500; color: #c4c4cc; }
.form-input, .form-textarea {
    width: 100%;
    padding: 15px 17px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 8px;
    color: #fff;
    font: inherit;
    outline: none;
    transition: border-color .25s, box-shadow .25s;
}
.form-input:focus, .form-textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(25,227,193,.15); }
.form-textarea { min-height: 170px; resize: vertical; }
.submit-btn {
    align-self: flex-start;
    padding: 14px 34px;
    border: none; border-radius: 40px;
    background: var(--grad);
    color: #04140f; font-weight: 700; font-size: 1rem;
    cursor: pointer;
    transition: transform .25s, box-shadow .25s;
}
.submit-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(25,227,193,.35); }
.form-message { padding: 14px; border-radius: 8px; margin-bottom: 22px; font-weight: 500; }
.form-message.success { background: rgba(46,204,113,.12); border: 1px solid #2ecc71; color: #2ecc71; }
.form-message.error { background: rgba(231,76,60,.12); border: 1px solid #e74c3c; color: #ff7b6b; }

/* ---------- Back to top ---------- */
.back-to-top {
    position: fixed; bottom: 28px; right: 28px;
    width: 46px; height: 46px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: rgba(30,30,37,.9);
    color: #fff; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all .3s;
    z-index: 900;
    backdrop-filter: blur(6px);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--grad); border-color: transparent; transform: translateY(-3px); }

/* ---------- Lightbox ---------- */
.lightbox-modal {
    position: fixed; inset: 0;
    background: rgba(8,8,10,.95);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    z-index: 2000;
    opacity: 0; visibility: hidden;
    transition: opacity .3s, visibility .3s;
    padding: 40px;
}
.lightbox-modal.active { opacity: 1; visibility: visible; }
.lightbox-content { max-width: 86vw; max-height: 86vh; object-fit: contain; border-radius: 6px; box-shadow: 0 10px 50px rgba(0,0,0,.8); }
.lightbox-close { position: absolute; top: 20px; right: 34px; font-size: 2.8rem; line-height: 1; cursor: pointer; transition: color .2s; }
.lightbox-close:hover { color: var(--accent); }
.lightbox-nav {
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 52px; height: 52px; border-radius: 50%;
    border: 1px solid var(--line); background: rgba(30,30,37,.8);
    color: #fff; font-size: 1.1rem; cursor: pointer;
    transition: background .25s;
}
.lightbox-nav:hover { background: var(--grad); }
.lightbox-nav.prev { left: 28px; }
.lightbox-nav.next { right: 28px; }
.lightbox-caption { margin-top: 14px; color: var(--muted); font-size: .9rem; }

/* ---------- Mobile bar ---------- */
.mobile-bar { display: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1280px) {
    .masonry { columns: 2; }
    .project-gallery-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .mobile-bar {
        display: flex; align-items: center; justify-content: space-between;
        position: sticky; top: 0; z-index: 1100;
        height: 60px; padding: 0 20px;
        background: var(--bg-side);
        border-bottom: 1px solid var(--line);
    }
    .mobile-brand { font-family: var(--font-head); font-weight: 700; font-size: 1.15rem; }
    .mobile-toggle { background: none; border: none; color: #fff; font-size: 1.4rem; cursor: pointer; }

    .sidebar { transform: translateX(-100%); transition: transform .3s ease; top: 60px; height: calc(100vh - 60px); width: min(320px, 85vw); }
    .sidebar.open { transform: none; box-shadow: 0 0 60px rgba(0,0,0,.7); }
    .sidebar .brand { display: none; }
    .sidebar-inner { padding-top: 16px; }

    .content { margin-left: 0; width: 100%; }
    .page { padding: 36px 22px; }
    .site-footer { padding: 20px 22px; }
    .project-gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .bio-content-grid { grid-template-columns: 1fr; gap: 40px; }
    .bio-portrait-wrapper { max-width: 320px; }
    .lightbox-nav.prev { left: 10px; } .lightbox-nav.next { right: 10px; }
}

@media (max-width: 560px) {
    .masonry { columns: 1; }
}