/* ==========================================================================
   Design System & Stylesheet: fiqhi.my.id (V2)
   Direction: Typography-led, editorial, responsive, purposeful motion
   Design tokens adhering strictly to design.md and antislop rules
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&family=Space+Grotesk:wght@500;600;700&display=swap');

/* --- Design Tokens --- */
:root {
  --color-bg: #F7F6F2;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F2F1EB;
  --color-text: #17191C;
  --color-muted: #555B66;
  --color-line: #D9D9D4;
  --color-line-light: #E8E8E3;
  --color-accent: #2457D6;
  --color-accent-hover: #1943AA;
  --color-accent-soft: #E8EEFF;
  --color-accent-soft-border: #C8D8FF;
  --color-focus: #1546B8;
  --color-badge-bg: #EAE9E2;
  --color-badge-text: #2B2F38;
  --color-tag-bg: #EFEFE9;
  --color-tag-text: #3E434D;
  --color-success: #1B7A43;
  --color-success-bg: #EAF7EE;

  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(23, 25, 28, 0.05);
  --shadow-md: 0 4px 12px rgba(23, 25, 28, 0.08);

  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 220ms cubic-bezier(0.16, 1, 0.3, 1);

  --max-width: 1240px;
}

html.dark {
  --color-bg: #111215;
  --color-surface: #181A1F;
  --color-surface-hover: #21242C;
  --color-text: #EDEDEA;
  --color-muted: #9BA1AA;
  --color-line: #2C3038;
  --color-line-light: #22262E;
  --color-accent: #4B7BFF;
  --color-accent-hover: #7095FF;
  --color-accent-soft: #17223D;
  --color-accent-soft-border: #283966;
  --color-focus: #7095FF;
  --color-badge-bg: #232730;
  --color-badge-text: #DCE1E8;
  --color-tag-bg: #1F222B;
  --color-tag-text: #C3C9D4;
  --color-success: #3DD67E;
  --color-success-bg: #132E1F;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

/* --- Accessibility Focus --- */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  background: var(--color-accent);
  color: #FFFFFF;
  padding: 0.5rem 1rem;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

/* --- Layout Container & Editorial Grid --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

@media (min-width: 768px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.main-content {
  flex: 1;
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  object-fit: cover;
}

.brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.1;
}

.brand-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

@media (min-width: 860px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-link {
  padding: 0.45rem 0.8rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

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

.nav-link.active {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 0.8rem;
  right: 0.8rem;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-ctrl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  min-height: 32px;
}

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

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

@media (min-width: 860px) {
  .menu-toggle {
    display: none;
  }
}

/* --- Mobile Menu Drawer --- */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(17, 18, 21, 0.6);
  z-index: 99;
  backdrop-filter: blur(4px);
}

.mobile-drawer.open {
  display: block;
}

.mobile-drawer-content {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: var(--shadow-md);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--color-line-light);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

/* --- Typography System --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.page-hero {
  padding-top: 3.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-line);
}

@media (min-width: 768px) {
  .page-hero {
    padding-top: 5rem;
    padding-bottom: 3.5rem;
  }
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
  display: inline-block;
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.05;
  margin-bottom: 1.25rem;
  max-width: 18ch;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.6;
  color: var(--color-muted);
  max-width: 62ch;
  margin-bottom: 2rem;
}

/* --- Buttons & CTAs --- */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 40px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border: 1px solid var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-line);
}

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

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.75rem;
  min-height: 32px;
}

/* --- Section Formatting --- */
.section-pad {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .section-pad {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
}

.section-head {
  margin-bottom: 2.25rem;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.4rem;
  display: block;
}

.section-title {
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.15;
  margin-bottom: 0.6rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 60ch;
}

/* --- Editorial Split / Dual Track --- */
.dual-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .dual-track {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

.track-col {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.track-header {
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
}

.track-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  background-color: var(--color-badge-bg);
  color: var(--color-badge-text);
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 0.5rem;
}

.track-title {
  font-size: 1.35rem;
  margin-bottom: 0.4rem;
}

.track-desc {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.track-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.track-item {
  display: flex;
  gap: 0.75rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-text);
}

.track-item-bullet {
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* --- Timeline Component (Experience / Education) --- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 9px;
  width: 2px;
  background-color: var(--color-line);
}

.timeline-entry {
  position: relative;
  padding-left: 2.25rem;
}

.timeline-dot {
  position: absolute;
  top: 6px;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background-color: var(--color-surface);
  border: 3px solid var(--color-accent);
  z-index: 2;
}

.timeline-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}

@media (min-width: 640px) {
  .timeline-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
  }
}

.timeline-title {
  font-size: 1.2rem;
  color: var(--color-text);
}

.timeline-company {
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.95rem;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  background: var(--color-badge-bg);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.timeline-meta {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.timeline-duties {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.timeline-duty {
  position: relative;
  padding-left: 1rem;
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.55;
}

.timeline-duty::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

/* --- Project Grid & Showcase --- */
.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.project-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.project-card-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  background-color: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: var(--radius-sm);
}

.project-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.status-active {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.status-dev {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

.status-archived {
  background-color: var(--color-badge-bg);
  color: var(--color-muted);
}

.project-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.project-card-desc {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex: 1;
}

.project-specs {
  border-top: 1px solid var(--color-line-light);
  padding-top: 1rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.spec-row {
  display: flex;
  gap: 0.5rem;
}

.spec-label {
  font-weight: 600;
  color: var(--color-text);
  min-width: 90px;
}

.spec-val {
  color: var(--color-muted);
}

.project-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: auto;
}

/* --- Troubleshooting & Case Study Layout --- */
.case-study {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.case-study-title {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.case-study-subtitle {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

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

@media (min-width: 640px) {
  .case-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.case-cell {
  background-color: var(--color-bg);
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.case-cell-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.35rem;
}

.case-cell-content {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.5;
}

/* --- Skills Matrix --- */
.skills-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .skills-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

.skills-group {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}

.skills-group-title {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.skills-group-desc {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 1.25rem;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 500;
  background-color: var(--color-tag-bg);
  color: var(--color-tag-text);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.tag-badge-verified {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
}

/* --- Contact & Info Cards --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
}

.contact-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  word-break: break-all;
  margin-bottom: 1rem;
}

.contact-note {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* --- Toast Notification --- */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-accent);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  font-size: 0.875rem;
  font-weight: 600;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* --- Floating WhatsApp CTA --- */
.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  background-color: #1FAF5E;
  color: #FFFFFF;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(31, 175, 94, 0.35);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: translateY(-2px);
  background-color: #17964F;
  color: #FFFFFF;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-line);
  background-color: var(--color-bg);
  padding-top: 3rem;
  padding-bottom: 3rem;
  margin-top: 4rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-muted);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line-light);
  padding-top: 1.5rem;
}

/* --- Reduced Motion Compliance --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .project-card:hover, .whatsapp-float:hover {
    transform: none !important;
  }
}