/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --radius: 8px;
    --transition: 0.3s ease;
    --nav-height: 64px;
    font-family: 'Poppins', sans-serif;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 20px);
}

/* ── Dark Theme (default) ── */
body.dark {
    --accent:       #7cabf7;
    --accent-soft:  rgba(124,171,247,0.12);
    --accent-border:rgba(124,171,247,0.25);
    --accent-hover: rgba(124,171,247,0.35);

    --bg:           #080c14;
    --bg-surface:   #0e1623;
    --bg-muted:     #172035;
    --border:       rgba(124,171,247,0.08);
    --text:         #dde8ff;
    --text-muted:   rgba(221,232,255,0.5);
    --text-dim:     rgba(221,232,255,0.25);
    --tag-bg:       rgba(124,171,247,0.08);
    --tag-text:     rgba(221,232,255,0.75);
    --btn-outline-border: rgba(124,171,247,0.25);
    --btn-outline-text:   #dde8ff;
    --btn-primary-text:   #080c14;
    --shadow:       0 4px 28px rgba(0,10,40,0.6);
    --wip-color:    #f6c547;
    --wip-bg:       rgba(246,197,71,0.1);
    --wip-border:   rgba(246,197,71,0.2);
    --photo-placeholder-bg: #0e1623;
}

/* ── Light Theme ── */
body.light {
    --accent:       #2a5fc9;
    --accent-soft:  rgba(42,95,201,0.08);
    --accent-border:rgba(42,95,201,0.22);
    --accent-hover: rgba(42,95,201,0.3);

    --bg:           #eef2fb;
    --bg-surface:   #e2e9f7;
    --bg-muted:     #d5dff0;
    --border:       rgba(42,95,201,0.1);
    --text:         #0d1a38;
    --text-muted:   rgba(13,26,56,0.55);
    --text-dim:     rgba(13,26,56,0.28);
    --tag-bg:       rgba(42,95,201,0.07);
    --tag-text:     rgba(13,26,56,0.75);
    --btn-outline-border: rgba(42,95,201,0.25);
    --btn-outline-text:   #0d1a38;
    --btn-primary-text:   #ffffff;
    --shadow:       0 4px 24px rgba(42,95,201,0.1);
    --wip-color:    #b07a00;
    --wip-bg:       rgba(176,122,0,0.08);
    --wip-border:   rgba(176,122,0,0.2);
    --photo-placeholder-bg: #d5dff0;
}

body {
    background: var(--bg);
    color: var(--text);
    transition: background var(--transition), color var(--transition);
    line-height: 1.6;
    padding-top: var(--nav-height);
}

.accent { color: var(--accent); }

/* ── Nav Theme Button ── */
.nav-theme-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-muted);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    flex-shrink: 0;
}

.nav-theme-btn:hover {
    color: var(--accent);
    border-color: var(--accent-border);
}

/* ── Hero ── */
.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    padding: 80px 24px 60px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.hero-grid {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.avatar-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent);
}

.badge {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent-border);
    padding: 4px 12px;
    border-radius: 999px;
}

.hero-name {
    font-size: clamp(48px, 7vw, 84px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -2px;
    color: var(--text);
    margin-bottom: 16px;
}

.hero-sub {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.hero-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 32px;
}

.hero-btns {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-primary {
    padding: 12px 28px;
    background: var(--accent);
    color: var(--btn-primary-text);
    font-weight: 700;
    font-size: 13px;
    text-decoration: none;
    border-radius: var(--radius);
    transition: opacity var(--transition);
    font-family: 'Poppins', sans-serif;
}

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

.btn-outline {
    padding: 12px 28px;
    background: transparent;
    color: var(--btn-outline-text);
    font-weight: 600;
    font-size: 13px;
    text-decoration: none;
    border: 1px solid var(--btn-outline-border);
    border-radius: var(--radius);
    transition: border-color var(--transition), color var(--transition);
    font-family: 'Poppins', sans-serif;
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* Hero side info grid */
.hero-side {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.side-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.side-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 6px;
}

.side-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

.side-value.accent { color: var(--accent); }

/* ── Main Wrapper ── */
.main-wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* ── Section ── */
.section {
    padding: 80px 0 0;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 8px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--text);
    margin-bottom: 8px;
}

.section-sub {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 32px;
}

/* ── About Grid ── */
/* 3 columns: photo | text | languages */
.about-grid {
    display: grid;
    grid-template-columns: 220px 1fr 1fr;
    gap: 32px;
    align-items: start;
    margin-top: 24px;
}

/* Photo */
.about-photo-wrap {
    position: relative;
}

.about-photo-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-surface);
}

/* Actual photo */
.about-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
    position: relative;
    z-index: 1;
}

/* Placeholder shown when photo is missing (onerror adds .no-photo) */
.about-photo-frame .photo-placeholder {
    display: none;
}

.about-photo-frame.no-photo .photo-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: absolute;
    inset: 0;
    background: var(--photo-placeholder-bg);
    color: var(--text-dim);
    font-size: 13px;
}

.about-photo-frame.no-photo .photo-placeholder i {
    font-size: 36px;
    color: var(--accent-border);
}

.about-photo-frame.no-photo .about-photo {
    display: none;
}

/* Decorative accent line under photo */
.about-photo-frame::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
    opacity: 0.6;
    z-index: 2;
}

/* Text */
.about-text p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* Languages */
.mini-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 14px;
}

.lang-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.lang-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
}

.lang-card .lang-quote {
    display: block;
    font-size: 11px;
    font-weight: 400;
    color: var(--accent);
    margin-top: 5px;
    font-style: italic;
    opacity: 0.85;
}

/* ── Skills Grid ── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 28px;
}

.skill-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.skill-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

.skill-cat {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

.tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tag {
    background: var(--tag-bg);
    color: var(--tag-text);
    font-size: 11px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
}

/* ── Projects Grid ── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    margin-top: 28px;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-decoration: none;
    display: block;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
    border-color: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.project-card.wip { cursor: default; }
.project-card.wip:hover { transform: none; box-shadow: none; border-color: var(--border); }

.project-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

.project-tag {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent-border);
    padding: 3px 10px;
    border-radius: 999px;
}

.project-tag.wip-tag {
    background: var(--wip-bg);
    color: var(--wip-color);
    border-color: var(--wip-border);
}

.project-arrow {
    font-size: 12px;
    color: var(--text-dim);
    transition: color var(--transition);
}

.project-card:hover .project-arrow { color: var(--accent); }

.project-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 10px;
    transition: color var(--transition);
}

.project-card:hover .project-title { color: var(--accent); }

.project-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
}

.project-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

.project-footer.muted { color: var(--text-dim); }

/* ── Contact Grid ── */
.contact-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 18px;
    margin-top: 28px;
}

.contact-email-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

.email-link {
    display: block;
    font-size: clamp(15px, 2.2vw, 22px);
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    margin: 8px 0 14px;
    word-break: break-all;
    transition: color var(--transition);
}

.email-link:hover { color: var(--accent); }

.contact-note {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
}

.socials-grid {
    display: grid;
    grid-template-rows: repeat(3, 1fr);
    gap: 12px;
}

.social-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    transition: border-color var(--transition);
}

.social-card:hover { border-color: var(--accent-hover); }

.social-icon {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: var(--bg-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: background var(--transition), color var(--transition);
}

.social-card:hover .social-icon { background: var(--accent-soft); color: var(--accent); }

.social-info { flex: 1; }

.social-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    transition: color var(--transition);
}

.social-card:hover .social-name { color: var(--accent); }

.social-handle {
    font-size: 11px;
    color: var(--text-dim);
    margin-top: 2px;
}

.social-arrow {
    font-size: 11px;
    color: var(--text-dim);
    transition: color var(--transition), transform var(--transition);
}

.social-card:hover .social-arrow { color: var(--accent); transform: translateX(3px); }

/* ── Footer ── */
.footer {
    border-top: 1px solid var(--border);
    padding: 24px;
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-dim);
    font-weight: 500;
}

/* ── Skip Link ── */
.skip-link {
    position: absolute;
    top: -100%;
    left: 8px;
    z-index: 1001;
    padding: 8px 16px;
    background: var(--accent);
    color: var(--btn-primary-text);
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--radius);
    transition: top 0.2s;
}

.skip-link:focus {
    top: 8px;
}

/* ── Navigation ── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 4px;
    align-items: center;
}

.nav-link {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: var(--radius);
    transition: color var(--transition), background var(--transition);
    letter-spacing: 0.02em;
}

.nav-link:hover {
    color: var(--text);
    background: var(--accent-soft);
}

.nav-link.active {
    color: var(--accent);
    background: var(--accent-soft);
}

.nav-toggle {
    display: none;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-muted);
    border-radius: 2px;
    transition: all var(--transition);
}

.nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Typing Cursor ── */
.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--accent);
    margin-left: 2px;
    animation: blink 0.7s step-end infinite;
    vertical-align: text-bottom;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* ── Education ── */
.edu-grid {
    display: grid;
    gap: 18px;
    margin-top: 28px;
}

.edu-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: border-color var(--transition);
}

.edu-card:hover {
    border-color: var(--accent-hover);
}

.edu-top {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.edu-year {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-dim);
    letter-spacing: 0.05em;
}

.edu-tag {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent-border);
    padding: 3px 10px;
    border-radius: 999px;
}

.edu-tag.completed {
    background: rgba(75, 200, 138, 0.1);
    color: #4bc88a;
    border-color: rgba(75, 200, 138, 0.25);
}

.edu-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.edu-school {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.edu-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ── Project Filter ── */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.filter-btn {
    font-size: 11px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
    font-family: 'Poppins', sans-serif;
}

.filter-btn:hover {
    border-color: var(--accent-border);
    color: var(--text);
}

.filter-btn.active {
    background: var(--accent);
    color: var(--btn-primary-text);
    border-color: var(--accent);
}

/* ── Contact Form ── */
.contact-form-wrap {
    margin-top: 28px;
}

.contact-form {
    display: grid;
    gap: 16px;
}

.form-group {
    display: grid;
    gap: 6px;
}

.form-group label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    font-family: 'Poppins', sans-serif;
    transition: border-color var(--transition);
    outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-dim);
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--accent-border);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-btn {
    padding: 12px 28px;
    background: var(--accent);
    color: var(--btn-primary-text);
    font-weight: 700;
    font-size: 13px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: opacity var(--transition);
    font-family: 'Poppins', sans-serif;
    justify-self: start;
}

.form-btn:hover {
    opacity: 0.85;
}

/* ── Back to Top ── */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow);
    z-index: 998;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    color: var(--accent);
    border-color: var(--accent-border);
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .section { opacity: 1; transform: none; }
    .section.visible { opacity: 1; transform: none; }
    .project-card:hover { transform: none; }
    .typing-cursor { animation: none; opacity: 1; }
}

/* ── Responsive ── */
@media (max-width: 1000px) {
    /* About: stack photo on top, text + langs side by side below */
    .about-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
    }
    .about-photo-wrap {
        grid-column: 1 / -1;
        display: flex;
        justify-content: center;
    }
    .about-photo-frame {
        width: 200px;
        aspect-ratio: 3 / 4;
    }
}

@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; }
    .hero-side { grid-template-columns: repeat(4, 1fr); }
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .hero-side { grid-template-columns: repeat(2, 1fr); }
    .projects-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr 1fr; }
    .footer-inner { flex-direction: column; gap: 6px; text-align: center; }

    /* About: all stack to single column on mobile */
    .about-grid {
        grid-template-columns: 1fr;
    }
    .about-photo-wrap {
        grid-column: 1;
    }
    .about-photo-frame {
        width: 160px;
    }
    .lang-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-links {
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        display: none;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 8px 16px 16px;
        gap: 2px;
    }
    .nav-links.open { display: flex; }
    .nav-link { width: 100%; padding: 12px 16px; }
    .nav-theme-btn { margin: 8px 0 0; width: 100%; border-radius: var(--radius); padding: 12px 16px; height: auto; justify-content: flex-start; gap: 8px; }
    .nav-theme-btn::before { content: 'Toggle theme'; font-size: 12px; font-weight: 600; font-family: 'Poppins', sans-serif; }
    .filter-bar { gap: 6px; }
    .filter-btn { font-size: 10px; padding: 5px 12px; }
}