/* ============================================
   MUHAMMAD FEBRIANTO — PORTFOLIO DESIGN SYSTEM
   Swiss Minimalist Aesthetic
   ============================================ */

/* --- Light Mode Tokens --- */
:root {
  --bg: #f8f9fa;
  --bg-alt: #edeeef;
  --surface: #ffffff;
  --text: #191c1d;
  --text-secondary: #5e5e5e;
  --primary: #b7102a;
  --primary-hover: #92001c;
  --border: #191c1d;
  --border-light: #d0d2d4;
  --tag-bg: #e2e2e2;
  --tag-text: #191c1d;
  --nav-bg: rgba(248, 249, 250, 0.90);
  --card-bg: #ffffff;
  --input-bg: #ffffff;
  --overlay: rgba(248,249,250,0.96);
}

/* --- Dark Mode Tokens --- */
html.dark {
  --bg: #0e1012;
  --bg-alt: #191c1d;
  --surface: #1c1f22;
  --text: #eef0f2;
  --text-secondary: #8a9099;
  --primary: #e8394e;
  --primary-hover: #c8283c;
  --border: rgba(238,240,242,0.20);
  --border-light: rgba(238,240,242,0.10);
  --tag-bg: #252a2e;
  --tag-text: #c8cdd4;
  --nav-bg: rgba(14, 16, 18, 0.94);
  --card-bg: #1c1f22;
  --input-bg: #1c1f22;
  --overlay: rgba(14,16,18,0.96);
}

/* --- Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  border-radius: 0 !important;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.35s ease, color 0.35s ease;
  min-height: 100dvh;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* --- Swiss Grid --- */
.swiss-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0;
}

/* --- Border Utilities --- */
.border-swiss   { border: 1px solid var(--border); }
.border-swiss-t { border-top: 1px solid var(--border); }
.border-swiss-b { border-bottom: 1px solid var(--border); }
.border-swiss-l { border-left: 1px solid var(--border); }
.border-swiss-r { border-right: 1px solid var(--border); }

/* --- Navigation --- */
.nav-container {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 64px;
  height: 64px;
  transition: background 0.35s ease;
}
@media (max-width: 767px) {
  .nav-container { padding: 0 20px; }
}

.nav-logo {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.03em;
  color: var(--text);
  text-transform: uppercase;
}
.nav-logo span { color: var(--primary); }

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 100%; height: 1px;
  background: var(--primary);
}

.nav-right { display: flex; align-items: center; gap: 16px; }

/* --- Dark Toggle --- */
.dark-toggle {
  width: 44px; height: 22px;
  background: var(--border-light);
  border: 1px solid var(--border);
  position: relative; cursor: pointer;
  transition: background 0.3s;
  flex-shrink: 0;
}
.dark-toggle.on { background: var(--primary); }
.dark-toggle::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  background: var(--text);
  transition: transform 0.3s ease, background 0.3s;
}
.dark-toggle.on::after { transform: translateX(22px); }

/* --- Hire Button --- */
.btn-hire {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 8px 20px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
  display: inline-block;
}
.btn-hire:hover { background: var(--text); color: var(--bg); }

/* --- Mobile Hamburger --- */
.hamburger { cursor: pointer; font-size: 24px; color: var(--text); background: none; border: none; }

/* --- Mobile Menu Overlay --- */
.mobile-menu {
  position: fixed; inset: 0;
  background: var(--overlay);
  z-index: 200;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex; flex-direction: column;
  padding: 24px 20px;
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu-link {
  font-family: 'Inter', sans-serif;
  font-size: 40px; font-weight: 800;
  letter-spacing: -0.03em; text-transform: uppercase;
  color: var(--text); text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  display: block;
  transition: color 0.2s, padding-left 0.25s;
}
.mobile-menu-link:hover { color: var(--primary); padding-left: 16px; }

/* --- Buttons --- */
.btn-primary {
  background: var(--primary); color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 14px 36px; border: none; cursor: pointer;
  transition: background 0.25s;
  display: inline-block; text-decoration: none;
}
.btn-primary:hover { background: var(--primary-hover); }

.btn-outline {
  background: transparent; color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 12px 28px; border: 1px solid var(--border); cursor: pointer;
  transition: background 0.25s, color 0.25s;
  display: inline-block; text-decoration: none;
}
.btn-outline:hover { background: var(--text); color: var(--bg); }

/* --- Section Label --- */
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--primary);
}

/* --- Hero Accent Name --- */
.hero-name {
  background: var(--primary); color: #fff;
  padding: 0 10px; display: inline;
}

/* --- Tags --- */
.tag {
  display: inline-block;
  background: var(--tag-bg); color: var(--tag-text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.08em;
  padding: 4px 10px;
  border: 1px solid var(--border-light);
  text-transform: uppercase;
}

/* --- Cards --- */
.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  transition: transform 0.35s ease;
  overflow: hidden;
}
.project-card:hover { transform: translateY(-6px); }

.grayscale-img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.6s ease;
}
.project-card:hover .grayscale-img { filter: grayscale(0%); }

/* --- Equalizer Bars --- */
.eq-bars { display: flex; align-items: flex-end; gap: 3px; height: 24px; }
.eq-bar {
  width: 3px; background: var(--primary);
  animation: eqBounce 0.9s ease-in-out infinite;
}
.eq-bar:nth-child(1) { height: 40%; animation-delay: 0s; }
.eq-bar:nth-child(2) { height: 80%; animation-delay: 0.15s; }
.eq-bar:nth-child(3) { height: 55%; animation-delay: 0.3s; }
.eq-bar:nth-child(4) { height: 70%; animation-delay: 0.08s; }
.eq-bar:nth-child(5) { height: 45%; animation-delay: 0.22s; }
@keyframes eqBounce {
  0%, 100% { transform: scaleY(0.35); }
  50% { transform: scaleY(1); }
}

/* --- Form --- */
.form-input {
  width: 100%;
  background: var(--input-bg); border: 1px solid var(--border);
  color: var(--text); font-family: 'Inter', sans-serif; font-size: 16px;
  padding: 14px 16px; outline: none; transition: border-color 0.2s;
}
.form-input:focus { border-color: var(--primary); }
.form-input::placeholder { color: var(--text-secondary); opacity: 0.7; }
textarea.form-input { resize: vertical; min-height: 150px; }

/* --- Footer --- */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--primary); }

/* --- Page Fade In --- */
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-fade { animation: pageFadeIn 0.45s ease forwards; }

/* --- Cursor blink --- */
@keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0;} }
.cursor { display:inline-block; width:3px; height:1em; background:var(--primary); animation:blink 1.1s step-end infinite; vertical-align:text-bottom; margin-left:3px; }

/* --- AOS overrides --- */
[data-aos="fade-up"] { opacity: 0; transform: translateY(20px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-aos="fade-up"].aos-animate { opacity: 1; transform: translateY(0); }
[data-aos="fade-right"] { opacity: 0; transform: translateX(-20px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-aos="fade-right"].aos-animate { opacity: 1; transform: translateX(0); }

/* --- Social Row --- */
.social-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 0; border-bottom: 1px solid var(--border);
  font-family: 'Inter', sans-serif; font-size: 22px; font-weight: 800;
  text-transform: uppercase; letter-spacing: -0.02em;
  transition: color 0.2s, padding-left 0.25s;
  cursor: pointer;
}
.social-row:hover { color: var(--primary); padding-left: 12px; }
.social-row .material-symbols-outlined { transition: transform 0.25s; }
.social-row:hover .material-symbols-outlined { transform: rotate(45deg); }

@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
  .swiss-grid { display: block; }
}
@media (min-width: 768px) {
  .show-mobile { display: none !important; }
}