/* =========================================
   İlke Acer — style.css
   Clean & Minimal
   ========================================= */

/* TOKENS */
:root {
    --bg:       #111111;
    --bg2:      #1a1a1a;
    --border:   #2a2a2a;
    --text1:    #f4f4f4;
    --text2:    #888888;
    --text3:    #444444;
    --accent:   #f4f4f4;

    --font: 'Inter', -apple-system, sans-serif;
    --max:  960px;
    --px:   1.5rem;
    --nav:  56px;
    --t:    0.2s ease;
}

[data-theme="light"] {
    --bg:     #fafafa;
    --bg2:    #f0f0f0;
    --border: #e0e0e0;
    --text1:  #111111;
    --text2:  #666666;
    --text3:  #aaaaaa;
    --accent: #111111;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text1);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background var(--t), color var(--t);
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
::selection { background: rgba(180,180,180,0.2); }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

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

.hidden { display: none !important; }

/* NAVBAR */
#navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav);
    background: var(--bg);
    border-bottom: 1px solid transparent;
    z-index: 100;
    transition: border-color var(--t);
}

#navbar.scrolled { border-color: var(--border); }

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

.nav-logo {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text1);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.85rem;
    color: var(--text2);
    transition: color var(--t);
}
.nav-link:hover, .nav-link.active { color: var(--text1); }

.nav-end {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text2);
    width: 32px; height: 32px;
    border-radius: 6px;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: border-color var(--t), color var(--t);
}
.theme-btn:hover { border-color: var(--text3); color: var(--text1); }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.hamburger span {
    width: 20px; height: 1.5px;
    background: var(--text2);
    display: block;
    transition: all var(--t);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(4px,4px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(4px,-4px); }

/* HERO */
#hero {
    padding: calc(var(--nav) + 80px) 0 80px;
}

.hero-content { max-width: 620px; }

.hero-tag {
    font-size: 0.8rem;
    color: var(--text2);
    margin-bottom: 1.25rem;
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 1.25rem;
}

.hero-desc {
    font-size: 1rem;
    color: var(--text2);
    max-width: 520px;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--text1);
    color: var(--bg);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 9px 20px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: opacity var(--t);
}
.btn-primary:hover { opacity: 0.85; }

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    color: var(--text2);
    font-size: 0.85rem;
    font-weight: 400;
    padding: 9px 20px;
    border-radius: 6px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: border-color var(--t), color var(--t);
}
.btn-ghost:hover { border-color: var(--text3); color: var(--text1); }

/* SECTIONS */
section { padding: 80px 0; }

#about    { border-top: 1px solid var(--border); }
#skills   { border-top: 1px solid var(--border); background: var(--bg2); }
#projects { border-top: 1px solid var(--border); }
#contact  { border-top: 1px solid var(--border); background: var(--bg2); }

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 2.5rem;
    color: var(--text1);
}

/* ABOUT */
.about-grid {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 3rem;
    align-items: start;
}

.about-photo-wrap img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    object-position: top;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.about-text {
    font-size: 0.95rem;
    color: var(--text2);
    margin-bottom: 1rem;
}

.info-list {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--border);
}

.info-item {
    display: flex;
    gap: 2rem;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.info-key {
    color: var(--text3);
    width: 90px;
    flex-shrink: 0;
    font-size: 0.78rem;
}

.info-val { color: var(--text2); }
.info-val a { color: var(--text1); transition: color var(--t); }
.info-val a:hover { color: var(--text2); }

/* SKILLS */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.skill-card {
    padding: 1.5rem;
    border-right: 1px solid var(--border);
}
.skill-card:last-child { border-right: none; }

.skill-cat {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text1);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.skill-items li {
    font-size: 0.83rem;
    color: var(--text2);
}

.cert-note {
    font-size: 0.8rem;
    color: var(--text3);
    padding: 0.75rem 0;
    border-top: 1px solid var(--border);
}

/* PROJECTS */
.featured-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2.5rem;
}

.fc-label {
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text3);
    margin-bottom: 0.75rem;
}

.fc-title {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text1);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.fc-desc {
    font-size: 0.88rem;
    color: var(--text2);
    max-width: 560px;
    margin-bottom: 1.25rem;
}

.fc-chips {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.fc-chips span {
    font-size: 0.75rem;
    color: var(--text2);
    background: var(--bg2);
    border: 1px solid var(--border);
    padding: 3px 10px;
    border-radius: 4px;
}

.sub-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text2);
    margin-bottom: 1rem;
}

#projects-list {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.loading-state {
    padding: 2rem;
    font-size: 0.85rem;
    color: var(--text3);
}

.empty-state {
    padding: 2rem 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.empty-state p { font-size: 0.875rem; color: var(--text2); }

/* Project row */
.proj-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.25rem;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
    transition: background var(--t);
}
.proj-row:last-child { border-bottom: none; }
.proj-row:hover { background: var(--bg2); }

.pr-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.pr-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.pr-info { min-width: 0; }

.pr-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pr-desc {
    font-size: 0.78rem;
    color: var(--text3);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 360px;
}

.pr-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.pr-stat {
    display: flex;
    align-items: center;
    gap: 3px;
    font-size: 0.75rem;
    color: var(--text3);
}
.pr-stat svg { width: 11px; height: 11px; }

.pr-link {
    font-size: 0.78rem;
    color: var(--text3);
    transition: color var(--t);
}
.pr-link:hover { color: var(--text1); }

/* CONTACT */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 4rem;
    align-items: start;
}

.contact-intro {
    font-size: 0.9rem;
    color: var(--text2);
    margin-bottom: 2rem;
    max-width: 320px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--border);
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--border);
    transition: color var(--t);
}
.contact-item:hover .ci-val { color: var(--text1); }

.ci-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text3);
}
.ci-val {
    font-size: 0.875rem;
    color: var(--text2);
    transition: color var(--t);
}

/* Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.field label {
    font-size: 0.75rem;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.field input,
.field textarea {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text1);
    font-family: var(--font);
    font-size: 0.875rem;
    padding: 9px 12px;
    outline: none;
    transition: border-color var(--t);
    resize: vertical;
}

.field input:focus,
.field textarea:focus { border-color: var(--text3); }
.field textarea { min-height: 120px; }

.form-feedback {
    font-size: 0.8rem;
    min-height: 1.2em;
}
.form-feedback.success { color: #6bba68; }
.form-feedback.error   { color: #c07070; }

/* FOOTER */
#footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
}

.footer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text3);
}

#footer-github:hover { color: var(--text2); }

/* FADE IN */
.fade-in {
    opacity: 0;
    transition: opacity 0.5s ease;
}
.fade-in.visible { opacity: 1; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav);
        left: 0; right: 0;
        flex-direction: column;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        padding: 1rem var(--px);
        gap: 0.25rem;
    }
    .nav-links.open { display: flex; }
    .nav-link { padding: 0.6rem 0; }
    .hamburger { display: flex; }

    .about-grid { grid-template-columns: 1fr; }
    .about-photo-wrap { width: 120px; }

    .skills-grid { grid-template-columns: 1fr 1fr; }
    .skill-card:nth-child(2) { border-right: none; }
    .skill-card { border-bottom: 1px solid var(--border); }
    .skill-card:nth-child(3), .skill-card:nth-child(4) { border-bottom: none; }

    .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .field-row { grid-template-columns: 1fr; }

    .footer-row { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 480px) {
    .skills-grid { grid-template-columns: 1fr; }
    .skill-card { border-right: none; border-bottom: 1px solid var(--border); }
    .skill-card:last-child { border-bottom: none; }
    .pr-desc { display: none; }
}