/* ============================================
   emirfaza.com — Portfolio Stylesheet
   Design inspired by nathanggtg.com
   3-column grid, minimalist gray + blue accent
   ============================================ */

/* --- CSS Variables / Theming --- */
:root {
    /* Light mode (default) */
    --bg: #ffffff;
    --fg: #111827;
    --fg-90: rgba(17, 24, 39, 0.90);
    --fg-75: rgba(17, 24, 39, 0.75);
    --fg-60: rgba(17, 24, 39, 0.60);
    --fg-55: rgba(17, 24, 39, 0.55);
    --fg-50: rgba(17, 24, 39, 0.50);
    --fg-45: rgba(17, 24, 39, 0.45);
    --fg-40: rgba(17, 24, 39, 0.40);
    --fg-30: rgba(17, 24, 39, 0.30);
    --fg-20: rgba(17, 24, 39, 0.20);
    --fg-10: rgba(17, 24, 39, 0.10);
    --fg-5:  rgba(17, 24, 39, 0.05);
    --fg-2:  rgba(17, 24, 39, 0.02);
    --fg-1:  rgba(17, 24, 39, 0.01);

    --accent: #3b82f6;
    --accent-text: #60a5fa;
    --accent-bg: rgba(59, 130, 246, 0.10);
    --accent-border: rgba(59, 130, 246, 0.20);
    --accent-glow: rgba(59, 130, 246, 0.50);
}

[data-theme="dark"] {
    --bg: #0a0a0a;
    --fg: #fafafa;
    --fg-90: rgba(250, 250, 250, 0.90);
    --fg-75: rgba(250, 250, 250, 0.75);
    --fg-60: rgba(250, 250, 250, 0.60);
    --fg-55: rgba(250, 250, 250, 0.55);
    --fg-50: rgba(250, 250, 250, 0.50);
    --fg-45: rgba(250, 250, 250, 0.45);
    --fg-40: rgba(250, 250, 250, 0.40);
    --fg-30: rgba(250, 250, 250, 0.30);
    --fg-20: rgba(250, 250, 250, 0.20);
    --fg-10: rgba(250, 250, 250, 0.10);
    --fg-5:  rgba(250, 250, 250, 0.05);
    --fg-2:  rgba(250, 250, 250, 0.02);
    --fg-1:  rgba(250, 250, 250, 0.01);

    --accent-text: #60a5fa;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* --- Navigation --- */
nav {
    border-bottom: 1px solid var(--fg-10);
}
.nav-inner {
    max-width: 768px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.875rem;
    color: var(--fg);
    text-decoration: none;
}
.nav-brand:hover { text-decoration: underline; }
.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.875rem;
}
.nav-links a {
    color: var(--fg-60);
    text-decoration: none;
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--fg); text-decoration: underline; }

/* Dark mode toggle button */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--fg-40);
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle:hover { color: var(--fg); }
.theme-toggle svg { width: 16px; height: 16px; }
/* Show sun in dark mode, moon in light mode */
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* Mobile nav (hidden on desktop) */
.nav-mobile {
    display: none;
    align-items: center;
    gap: 1rem;
}
.nav-mobile .theme-toggle svg { width: 20px; height: 20px; }
.nav-hamburger {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--fg-60);
    display: flex;
}
.nav-hamburger svg { width: 20px; height: 20px; }

/* --- Main Layout --- */
main {
    min-height: calc(100vh - 57px - 73px); /* viewport minus nav + footer */
}
.container {
    max-width: 1152px; /* max-w-6xl */
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
}

/* Responsive: 3-column on large screens */
@media (min-width: 1024px) {
    .container { padding: 2.5rem 1.5rem 4rem; }
    .grid {
        grid-template-columns: 200px 1fr 200px;
        gap: 3rem;
    }
}

/* --- Left Sidebar --- */
.left-sidebar {
    position: relative;
}
@media (min-width: 1024px) {
    .left-sidebar {
        position: sticky;
        top: 2rem;
        align-self: start;
    }
}
.left-sidebar h1 {
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.2;
    color: var(--fg);
}
.left-sidebar .role {
    margin-top: 0.25rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--fg-45);
}
.left-sidebar .bio {
    margin-top: 1.25rem;
    font-size: 0.875rem;
    line-height: 1.625;
    color: var(--fg-60);
}

/* Social links */
.social-links {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    font-size: 0.875rem;
}
.social-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--fg-50);
    text-decoration: none;
    transition: color 0.2s;
}
.social-links a:hover { color: var(--fg); }
.social-links a svg { width: 16px; height: 16px; opacity: 0.50; transition: opacity 0.2s; }
.social-links a:hover svg { opacity: 1; }

/* Resume download link */
.resume-link {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--fg-10);
}
.resume-link a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--fg-50);
    text-decoration: none;
    transition: color 0.2s;
}
.resume-link a:hover { color: var(--fg); }
.resume-link a svg { width: 16px; height: 16px; opacity: 0.50; transition: opacity 0.2s; }
.resume-link a:hover svg { opacity: 1; }

@media (min-width: 1024px) {
    .social-links { flex-direction: column; gap: 0.5rem; }
    .resume-link {
        margin-top: 0.75rem;
        padding-top: 0;
        border-top: none;
    }
}

/* --- Center Column --- */
.center { min-width: 0; }
.section { margin-bottom: 3.5rem; }
.section:last-child { margin-bottom: 0; }
.section-heading {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--fg);
    margin-bottom: 1.5rem;
}

/* --- Experience Timeline --- */
.timeline { position: relative; }
.timeline-line {
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 1.5px;
    background: var(--fg-10);
}

.timeline-entry {
    position: relative;
    padding-left: 2rem;
    padding-bottom: 1.5rem;
}
.timeline-entry:last-child { padding-bottom: 0; }

/* Timeline dots */
.timeline-dot {
    position: absolute;
    left: 0;
    top: 6px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    border: 2px solid var(--fg-30);
    background: var(--bg);
    transition: all 0.2s;
}
.timeline-dot.current {
    border-color: var(--accent);
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

/* Accordion header button */
.timeline-button {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    margin: -0.5rem;
    border-radius: 0.375rem;
    color: inherit;
    font: inherit;
}
.timeline-button:hover { background: var(--fg-2); }

.timeline-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.375rem;
}
.timeline-date-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}
.timeline-date {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.75rem;
    color: var(--fg-50);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

/* Badges */
.badge-current {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-text);
    background: var(--accent-bg);
    border: 1px solid var(--accent-border);
    padding: 0.125rem 0.5rem;
    border-radius: 0.25rem;
    line-height: 1;
}
.badge-type {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.625rem;
    color: var(--fg-50);
    border: 1px solid var(--fg-10);
    border-radius: 0.25rem;
    padding: 0.125rem 0.375rem;
    background: var(--fg-1);
    line-height: 1;
}

/* Chevron icon */
.chevron {
    width: 16px;
    height: 16px;
    color: var(--fg-30);
    transition: transform 0.2s, color 0.2s;
    flex-shrink: 0;
}
.timeline-button:hover .chevron { color: var(--fg); }
.timeline-button[aria-expanded="true"] .chevron { transform: rotate(180deg); }

/* Company name and location */
.timeline-company-row {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0 0.5rem;
    margin-bottom: 0.375rem;
}
.timeline-company {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--fg);
    line-height: 1.3;
}
.timeline-button:hover .timeline-company { text-decoration: underline; }
.timeline-location {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--fg-50);
}

/* Role entries within timeline */
.timeline-roles { margin-top: 0.375rem; }
.timeline-role {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--fg-75);
    margin-bottom: 0.375rem;
}
.timeline-role-title { font-weight: 600; color: var(--fg-90); }
.timeline-role-dates {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.75rem;
    color: var(--fg-50);
}

/* Expanded content */
.timeline-content {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.2s ease;
}
.timeline-content.open {
    max-height: 500px;
    opacity: 1;
}
.timeline-content-inner {
    padding-top: 0.5rem;
}
.timeline-description {
    font-size: 0.875rem;
    color: var(--fg-60);
    line-height: 1.625;
    margin-bottom: 0.75rem;
}

/* --- Project Cards --- */
.projects { display: flex; flex-direction: column; gap: 1.5rem; }

.project-card {
    border: 1px solid var(--fg-10);
    border-radius: 0.75rem;
    padding: 1.25rem;
    transition: background 0.2s;
}
.project-card:hover { background: var(--fg-2); }
@media (min-width: 768px) { .project-card { padding: 1.5rem; } }

.project-card.group { }
.project-card.group:hover .project-title { text-decoration: underline; }

.project-title {
    display: inline-block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--fg);
    text-decoration: none;
}
.project-title .arrow { font-weight: 400; }

.project-description {
    font-size: 0.875rem;
    color: var(--fg-60);
    line-height: 1.625;
    margin-top: 0.5rem;
}

.project-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 1.5rem;
    margin-top: 1.25rem;
}

/* Tech tags */
.tech-tags { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.tech-tag {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.6875rem;
    color: var(--fg-55);
    border: 1px solid var(--fg-10);
    border-radius: 0.25rem;
    padding: 0.125rem 0.5rem;
    background: var(--fg-2);
}

/* GitHub stats */
.gh-stats {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    font-size: 0.75rem;
    color: var(--fg-45);
    margin-left: auto;
}
.gh-lang { display: flex; align-items: center; gap: 0.375rem; }
.gh-lang-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--fg-20);
}
.gh-stars, .gh-forks {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.projects-cta {
    margin-top: 1.5rem;
    font-size: 0.875rem;
}
.projects-cta a {
    color: var(--fg-50);
    text-decoration: none;
    transition: color 0.2s;
}
.projects-cta a:hover { color: var(--fg); text-decoration: underline; }

/* --- Right Sidebar --- */
.right-sidebar {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}
@media (min-width: 1024px) {
    .right-sidebar {
        position: sticky;
        top: 2rem;
        align-self: start;
    }
}
.right-sidebar-section h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--fg-50);
    margin-bottom: 0.75rem;
}

/* Skills */
.skill-category { margin-bottom: 0.75rem; }
.skill-category:last-child { margin-bottom: 0; }
.skill-category-label {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--fg-70, var(--fg-75));
}
.skill-pills {
    margin-top: 0.375rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}
.skill-pill {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.6875rem;
    color: var(--fg-60);
    border: 1px solid var(--fg-10);
    border-radius: 0.25rem;
    padding: 0.125rem 0.5rem;
    background: var(--fg-2);
}

/* Contact section */
.contact-text {
    font-size: 0.875rem;
    color: var(--fg-55);
    line-height: 1.625;
    margin-bottom: 0.75rem;
}
.contact-links { display: flex; flex-direction: column; gap: 0.25rem; }
.contact-links a {
    font-size: 0.875rem;
    color: var(--fg-75);
    text-decoration: none;
    transition: color 0.2s;
}
.contact-links a:hover { color: var(--fg); text-decoration: underline; }

/* --- Footer --- */
footer {
    border-top: 1px solid var(--fg-10);
    padding: 2rem 0;
}
.footer-inner {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}
.footer-copyright {
    font-size: 0.875rem;
    color: var(--fg-40);
}
.footer-links {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
}
.footer-links a {
    color: var(--fg-40);
    text-decoration: none;
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--fg); text-decoration: underline; }
@media (min-width: 768px) {
    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* --- Mobile: show hamburger, hide desktop nav links --- */
@media (max-width: 767px) {
    .nav-links { display: none; }
    .nav-mobile { display: flex; }

    /* Make sure non-sticky content sits above sticky nav if needed */
    nav { position: relative; z-index: 10; }
    .left-sidebar, .right-sidebar { z-index: auto; }
}