/*
  DESIGN DECISIONS (R-31)
  Color: Dark mode only. Accent #0D6FFD at key moments only.
  Typography: Manrope - chosen for clean readability with wide weight range.
  Layout: Asymmetric hero, varied section compositions (RHYTHM 2).
  Motion: Hover states + subtle transitions only (MOTION 1).
  Radius: 4px tags, 6px buttons/inputs, 8px cards, 50% avatar - deliberate variation (R-11).
  Shadow: Only on sticky nav (elevation marker). No floating cards (R-12).
  Accent blue: name in hero, primary CTA, focus states, section labels only.
  Dark mode: Default and only mode.
*/

/* ===== RESET ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== TOKENS: DARK MODE (default) ===== */
:root {
    --accent: #0D6FFD;
    --accent-hover: #0b5dd6;
    --accent-muted: rgba(13, 111, 253, 0.1);

    --bg: #080808;
    --bg-raised: #111111;
    --bg-nav: rgba(8, 8, 8, 0.88);
    --bg-mobile-menu: #0d0d0d;

    --text: #f0f0f0;
    --text-secondary: #888888;
    --text-tertiary: #555555;

    --border: #232323;
    --border-hover: #333333;

    --form-bg: #111111;
    --form-input-bg: #080808;

    --btn-outline-hover-bg: rgba(255,255,255,0.03);
    --filter-active-bg: #f0f0f0;
    --filter-active-text: #080808;

    --project-card-bg: #080808;
    --project-card-hover: #111111;

    --form-success-bg: rgba(34, 197, 94, 0.08);
    --form-success-border: rgba(34, 197, 94, 0.3);
    --form-success-text: #4ade80;
    --form-error-bg: rgba(239, 68, 68, 0.08);
    --form-error-border: rgba(239, 68, 68, 0.3);
    --form-error-text: #f87171;
}

/* ===== BASE ===== */
html {
    font-size: 16px;
}

body {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Focus visible for keyboard accessibility (R-32) */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== NAVIGATION ===== */
/* Glassmorphism on nav only (1 element, dose cap R-10): serves elevation hierarchy */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg-nav);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 0 var(--border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.01em;
    flex-shrink: 0;
}

.logo img {
    display: block;
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    gap: 36px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: color 0.2s;
    letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
}

/* Nav actions: language toggle + mobile hamburger */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    padding: 8px 12px;
    transition: all 0.2s;
    font-family: inherit;
}

.lang-toggle:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

.lang-toggle i {
    font-size: 14px;
}

#currentLang {
    letter-spacing: 0.02em;
}

.mobile-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    padding: 8px;
    transition: border-color 0.2s;
    width: 40px;
    height: 40px;
    position: relative;
}

.mobile-toggle:hover {
    border-color: var(--border-hover);
}

/* Tombol: susun garis secara vertikal di tengah dengan jarak tetap */
.mobile-toggle {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

/* Setiap garis mengikuti alur normal (bukan absolute) sehingga jaraknya selalu sama */
.mobile-toggle .hamburger-line {
    display: block;
    flex-shrink: 0;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--text);
    transform-origin: center;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Keadaan aktif: jarak 5px + tinggi 2px = 7px per langkah */
.mobile-toggle.active .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-toggle.active .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: var(--bg-mobile-menu);
    padding: 72px 28px 32px;
    transition: right 0.25s ease;
    z-index: 99;
    border-left: 1px solid var(--border);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    transition: color 0.2s;
}

.mobile-menu a:hover {
    color: var(--text);
}

.mobile-close {
    position: absolute;
    top: 18px;
    right: 18px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    padding: 8px 10px;
}

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 80px;
    align-items: center;
    width: 100%;
}

/* Thin vertical rule left of text: identity motif, marks main column */
.hero-text {
    padding-left: 20px;
    border-left: 2px solid var(--accent);
}

.hero-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 20px;
}

/* H1 as primary focal point per screen (Part 3) */
.hero-text h1 {
    font-size: 64px;
    font-weight: 900;
    line-height: 1.0;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--text);
}

/* Accent blue on name only: the one deliberate accent (Part 3) */
.hero-text .name-accent {
    color: var(--accent);
}

.hero-text .role {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

.hero-text .bio {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.75;
    max-width: 480px;
}

.cta-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

/* ===== BUTTONS ===== */
.btn {
    padding: 11px 22px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    transition: all 0.2s;
    border: 1px solid transparent;
    cursor: pointer;
    font-family: inherit;
    letter-spacing: 0.01em;
}

/* Primary CTA: solid accent, the action that matters (R-26) */
.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border-color: var(--border-hover);
}

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

/* ===== SOCIAL LINKS ===== */
.social-links {
    display: flex;
    gap: 10px;
}

.social-links a {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    transition: all 0.2s;
}

.social-links a:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

/* ===== HERO IMAGE ===== */
.hero-image {
    display: flex;
    justify-content: center;
}

.hero-image-frame {
    position: relative;
    width: 360px;
    height: 360px;
}

/* Offset ring: identity motif repeated as decorative echo */
.hero-image-frame::before {
    content: '';
    position: absolute;
    top: -12px;
    right: -12px;
    width: 100%;
    height: 100%;
    border: 1px solid var(--border);
    border-radius: 50%;
    pointer-events: none;
}

.hero-image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid var(--border);
    display: block;
}

/* ===== SECTION BASE ===== */
section {
    padding: 100px 0;
}

section + section {
    border-top: 1px solid var(--border);
}

/* ===== SECTION LABEL (identity motif: repeated typographic mark) ===== */
.section-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
    display: block;
}

.section-title {
    font-size: 38px;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.1;
    margin-bottom: 16px;
    color: var(--text);
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ===== ABOUT: Left/right layout, breaks uniform centered-title pattern ===== */
.about-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 80px;
    align-items: start;
}

.about-left .section-title {
    font-size: 34px;
}

.about-left .section-desc {
    margin-bottom: 20px;
}

.info-list {
    display: grid;
    gap: 2px;
    margin-top: 32px;
}

.info-row {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 16px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    align-items: start;
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--text-tertiary);
    font-weight: 500;
}

.info-value {
    color: var(--text-secondary);
}

.info-value a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

.info-value a:hover {
    color: var(--text);
}

/* ===== PASSIONS ===== */
.about-right {
    padding-top: 60px;
}

.passion-list {
    display: grid;
    gap: 24px;
}

.passion-item {
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: 16px;
    align-items: start;
}

/* Numbered index instead of generic icon (R-04) */
.passion-number {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-tertiary);
    padding-top: 4px;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.05em;
}

.passion-content h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.passion-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== SKILLS: horizontal label+tags rows, not uniform cards (R-14) ===== */
.skills-layout {
    display: grid;
}

.skill-category {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 32px;
    align-items: start;
    padding: 28px 0;
    border-bottom: 1px solid var(--border);
}

.skill-category:last-child {
    border-bottom: none;
}

.skill-cat-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
    padding-top: 4px;
}

.skill-cat-sub {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-tertiary);
    margin-top: 4px;
}

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

/* Skill tags with optional icon: 4px radius (distinct from card 8px, R-11) */
.skill-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: border-color 0.2s, color 0.2s;
}

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

/* Icon inside skill tag: sized to match text, no glow (R-13) */
.skill-tag i,
.skill-tag img.tag-icon {
    font-size: 14px;
    width: 14px;
    text-align: center;
    flex-shrink: 0;
    opacity: 0.75;
}

.skill-tag img.tag-icon {
    height: 14px;
    width: auto;
    object-fit: contain;
}

/* ===== PROJECTS ===== */
.projects-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 48px;
    gap: 24px;
}

.filter-buttons {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-tertiary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

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

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

/* Grid with 1px dividers: no floating shadows (R-12) */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    overflow: hidden;
}

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

.project-card:hover {
    background: var(--project-card-hover);
}

.project-image-wrap {
    overflow: hidden;
    aspect-ratio: 16/9;
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.project-card:hover .project-image {
    transform: scale(1.03);
}

.project-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.project-tag {
    padding: 3px 8px;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: 0.03em;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.project-tag i {
    font-size: 12px;
    opacity: 0.75;
}

.project-content h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
    line-height: 1.3;
    color: var(--text);
}

.project-content p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
    flex: 1;
}

.project-links {
    display: flex;
    gap: 8px;
}

.project-links .btn {
    flex: 1;
    justify-content: center;
    padding: 8px 12px;
    font-size: 13px;
}

/* ===== CONTACT: info left + form right, different from other sections ===== */
.contact-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info .section-title {
    font-size: 30px;
}

.contact-info .section-desc {
    font-size: 15px;
    margin-bottom: 36px;
}

.contact-methods {
    display: grid;
    gap: 2px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    transition: color 0.2s;
}

.contact-method:last-child {
    border-bottom: none;
}

.contact-method-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 14px;
    flex-shrink: 0;
    transition: border-color 0.2s;
}

.contact-method:hover .contact-method-icon {
    border-color: var(--border-hover);
}

.contact-method-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    display: block;
    margin-bottom: 2px;
}

.contact-method-value {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.contact-method:hover .contact-method-value {
    color: var(--text);
}

/* ===== CONTACT FORM ===== */
.contact-form {
    padding: 36px;
    background: var(--form-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 13px;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--form-input-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s;
}

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    /* Custom focus for form inputs: visible, accessible (R-32) */
    box-shadow: 0 0 0 3px var(--accent-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

/* Form states: success, error, loading (R-27) */
.form-status {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
    display: none;
}

.form-status.success {
    background: var(--form-success-bg);
    border: 1px solid var(--form-success-border);
    color: var(--form-success-text);
    display: block;
}

.form-status.error {
    background: var(--form-error-bg);
    border: 1px solid var(--form-error-border);
    color: var(--form-error-text);
    display: block;
}

.form-submit {
    width: 100%;
}

/* ===== FOOTER ===== */
footer {
    border-top: 1px solid var(--border);
    padding: 28px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-content p {
    color: var(--text-tertiary);
    font-size: 13px;
}

/* ===== RESPONSIVE (R-03) ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr 300px;
        gap: 48px;
    }

    .about-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-right {
        padding-top: 0;
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero {
        padding-top: 120px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: left;
    }

    .hero-text h1 {
        font-size: 42px;
    }

    .hero-image {
        order: -1;
    }

    .hero-image-frame {
        width: 220px;
        height: 220px;
    }

    .skill-category {
        grid-template-columns: 1fr;
        gap: 16px;
    }

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

    .projects-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 28px;
    }

    .hero-text {
        padding-left: 16px;
    }

    .contact-form {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-text h1 {
        font-size: 34px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn {
        width: 100%;
        justify-content: center;
    }
}