/* ============================================================
   Portfolio — Design System
   Dark-only. Bootstrap 5.3 loaded only for CV modal.
   ============================================================ */

:root {
    --bg-base:        #111418;
    --bg-nav:         rgba(17, 20, 24, 0.85);
    --bg-card:        #1c2128;
    --bg-card-hover:  #21262d;
    --border:         rgba(255, 255, 255, 0.07);
    --border-accent:  rgba(16, 185, 129, 0.3);
    --accent:         #10b981;
    --accent-hover:   #059669;
    --accent-dim:     rgba(16, 185, 129, 0.12);
    --text-primary:   #e6edf3;
    --text-secondary: #9aa3ad;
    --text-muted:     #6e7681;
}

/* ── BASE ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 18px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding-top: 56px;
}

/* ── NAVBAR ────────────────────────────────────────────── */
#main-nav {
    background: var(--bg-nav) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0 !important;
    height: 56px;
}

#main-nav .navbar-brand {
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--accent) !important;
    transition: opacity 0.15s;
    padding: 0;
}

#main-nav .navbar-brand:hover { opacity: 0.75; }

.nav-btn {
    font-family: 'DM Sans', sans-serif;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-secondary) !important;
    background: transparent !important;
    border: 1px solid transparent !important;
    border-radius: 6px;
    padding: 6px 14px !important;
    transition: color 0.15s, border-color 0.15s;
}

.nav-btn:hover {
    color: var(--text-primary) !important;
    border-color: var(--border) !important;
    background: transparent !important;
}

.nav-btn.active {
    color: var(--accent) !important;
    border-color: var(--border-accent) !important;
    background: var(--accent-dim) !important;
}

/* ── PAGE WIDTH WRAPPER ────────────────────────────────── */
/*
  .hero-section    — hero block, extra top padding
  .about-grid      — education/experience two-column block
  .page-section    — all other sections (skills, projects)
  All share 860px max-width and horizontal padding.
*/
.hero-section {
    max-width: 860px;
    margin: 0 auto;
    padding: 100px 40px 90px;
    border-bottom: 1px solid var(--border);
}

.about-grid {
    max-width: 860px;
    margin: 0 auto;
    padding: 56px 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    border-bottom: 1px solid var(--border);
}

.page-section {
    max-width: 860px;
    margin: 0 auto;
    padding: 72px 40px;
    border-bottom: 1px solid var(--border);
}

/* Last section has no border */
.page-section:last-of-type { border-bottom: none; }

/* ── SECTION TYPOGRAPHY ────────────────────────────────── */
.section-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-title {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: clamp(35px, 4.4vw, 48px);
    font-weight: 400;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.1;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-weight: 300;
}

/* ── HERO ──────────────────────────────────────────────── */
.hero-name {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: clamp(57px, 7.7vw, 88px);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -1px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.hero-subtitle {
    font-size: 22px;
    font-weight: 300;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-bio {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 560px;
    margin-bottom: 32px;
    font-weight: 300;
}

.hero-contacts {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.hero-contacts a {
    font-size: 15px;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 2px;
    transition: color 0.15s, border-color 0.15s;
}

.hero-contacts a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.hero-contacts .sep {
    color: var(--text-muted);
    font-size: 11px;
    user-select: none;
}

/* ── ABOUT GRID (education + experience) ───────────────── */
.about-block-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
}

.about-block h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.4;
}

.about-block p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    font-weight: 300;
    margin: 0;
}

.about-block .detail {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ── SKILLS ────────────────────────────────────────────── */
.skill-group { margin-bottom: 36px; }

.skill-group-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px 12px;
    white-space: nowrap;
    transition: border-color 0.15s, color 0.15s;
}

.skill-tag:hover {
    border-color: var(--border-accent);
    color: var(--accent);
}

.skill-tag.primary {
    border-color: var(--border-accent);
    color: var(--accent);
    background: var(--accent-dim);
}

/* ── PROJECTS ──────────────────────────────────────────── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s, background 0.2s;
}

.project-card:hover {
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.project-tag {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 10px;
}

.project-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.3;
}

.project-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    font-weight: 300;
    flex: 1;
    margin: 0;
}

.project-links {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-primary-accent {
    display: block;
    text-align: center;
    font-family: 'DM Sans', sans-serif;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #000 !important;
    background: var(--accent);
    border: none;
    border-radius: 6px;
    padding: 9px 16px;
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.15s;
}

.btn-primary-accent:hover { opacity: 0.85; }

.btn-ghost {
    display: block;
    text-align: center;
    font-family: 'DM Sans', sans-serif;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-primary) !important;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 9px 16px;
    text-decoration: none;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
}

.btn-ghost:hover {
    color: var(--text-primary) !important;
    border-color: rgba(255, 255, 255, 0.2);
}

/* ── FOOTER ────────────────────────────────────────────── */
footer {
    max-width: 860px;
    margin: 0 auto;
    padding: 32px 40px;
}

footer p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
}

/* ── MODAL (Bootstrap) ─────────────────────────────────── */
.modal-content {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-accent) !important;
    color: var(--text-primary) !important;
}

.modal-header {
    border-color: var(--border) !important;
    background-color: #161b22 !important;
}

.modal-title {
    font-family: 'DM Sans', sans-serif;
    color: var(--accent);
    font-weight: 600;
}

/* Raise modal above everything */
.modal          { z-index: 2000 !important; }
.modal-backdrop { z-index: 1990 !important; }

/* ── MOBILE NAV DRAWER ─────────────────────────────────── */
@media (max-width: 991.98px) {
    /*
      backdrop-filter creates a stacking context that traps fixed
      descendants inside the nav's bounding box — disable on mobile.
      Raise z-index so it sits above the backdrop overlay.
    */
    #main-nav {
        backdrop-filter: none !important;
        z-index: 1060 !important;
    }

    #navbarNav {
        position: fixed !important;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(240px, 70vw);
        background: var(--bg-card);
        border-left: 1px solid var(--border);
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.25);
        padding: 5.5rem 1.75rem 2rem;
        display: flex !important;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        transform: translateX(100%);
        transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        overflow-y: auto;
    }

    #navbarNav.drawer-open { transform: translateX(0); }

    #navbarNav .navbar-nav {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0.5rem !important;
        width: 100%;
    }

    #navbarNav .nav-btn {
        width: 100%;
        text-align: left;
        font-size: 14px !important;
        padding: 0.65rem 1rem !important;
        border-radius: 0.5rem;
    }

    /* Backdrop — z-index below nav (1059 < 1060) */
    .nav-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        z-index: 1059;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .nav-backdrop.show {
        opacity: 1;
        visibility: visible;
    }

    .navbar-toggler.is-open .navbar-toggler-icon {
        opacity: 0.7;
    }
}

/* ── RESPONSIVE ────────────────────────────────────────── */
@media (max-width: 768px) {
    .hero-section,
    .page-section {
        padding: 60px 24px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        padding: 40px 24px;
        gap: 28px;
    }

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