/* ##################################################
################## FOUNDATION #######################
################################################## */

:root,
[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #0e0d0b;
  --color-surface: #161412;
  --color-surface-2: #252324;
  --color-text: #f7f5f2;
  --color-text-muted: #b5afa8;
  --color-text-soft: rgba(247, 245, 242, 0.72);
  --color-primary: #c9a84c;
  --color-primary-hover: #a88a3b;
  --color-primary-soft: rgba(201, 168, 76, 0.18);
  --color-accent: #f7f5f2;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(201, 168, 76, 0.4);
  --color-page-gradient: linear-gradient(180deg, rgba(18, 16, 15, 1), rgba(13, 12, 11, 1));
  --color-hero-accent: radial-gradient(circle at top right, rgba(201, 168, 76, 0.16), transparent 42%);
  --shadow-card: 0 18px 48px rgba(0, 0, 0, 0.34);
}

[data-theme="light"] {
  color-scheme: light;
  --color-bg: #f7f3ee;
  --color-surface: #ffffff;
  --color-surface-2: #efe8de;
  --color-text: #171310;
  --color-text-muted: #5d554c;
  --color-text-soft: rgba(23, 19, 16, 0.68);
  --color-primary: #8a6d1f;
  --color-primary-hover: #6a5418;
  --color-primary-soft: rgba(138, 109, 31, 0.12);
  --color-accent: #171310;
  --color-border: rgba(17, 17, 17, 0.08);
  --color-border-strong: rgba(138, 109, 31, 0.32);
  --color-page-gradient: linear-gradient(180deg, rgba(246, 243, 239, 1), rgba(255, 255, 255, 1));
  --color-hero-accent: radial-gradient(circle at top right, rgba(138, 109, 31, 0.10), transparent 38%);
  --shadow-card: 0 16px 42px rgba(26, 18, 9, 0.1);
}

:root {
  --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-display: 'Arial Black', 'Segoe UI', sans-serif;
  --fs-body: clamp(0.96rem, 0.93rem + 0.14vw, 1rem);
  --fs-copy: clamp(0.9rem, 0.87rem + 0.12vw, 0.96rem);
  --fs-label: clamp(0.68rem, 0.66rem + 0.08vw, 0.74rem);
  --radius-card: 16px;
  --nav-height: 64px;
}

/* ==================================================
===================== GLOBAL ELEMENTS ===============
================================================== */
html {
  scroll-behavior: smooth;
  min-height: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  background-color: var(--color-bg);
  background-image: var(--color-page-gradient);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.5;
  transition: background-color 0.55s ease, color 0.55s ease, border-color 0.55s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--color-text);
  margin-top: 0;
}

h1, .hero-title {
  font-family: var(--font-display);
  letter-spacing: 0.015em;
  text-transform: uppercase;
}

p {
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: var(--fs-copy);
  line-height: 1.6;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-hover);
}

.container {
  box-sizing: border-box; /* keep padding inside width: 100% so mobile never overflows the viewport */
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }

.eyebrow {
  font-family: var(--font-display);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  margin: 0;
}

/* ==================================================
======================= NAV BAR =====================
================================================== */
.site-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-bar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1rem;
  color: var(--color-text);
}

.site-brand:hover {
  color: var(--color-text);
}

.site-brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  background: #0e0d0b;
  border: 1px solid var(--color-border-strong);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
  display: block;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--color-border-strong);
  color: var(--color-primary);
}

.theme-toggle-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

/* ---- Primary navigation ---- */
.site-bar-row {
  gap: 0.75rem;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  border: 0;
  background: none;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text);
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary);
}

.nav-caret {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.2s ease;
}

.has-dropdown.is-open .nav-caret {
  transform: rotate(180deg);
}

.nav-dropdown {
  list-style: none;
  margin: 0;
  padding: 0.4rem;
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 210px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}

.has-dropdown:hover > .nav-dropdown,
.has-dropdown:focus-within > .nav-dropdown,
.has-dropdown.is-open > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-link {
  display: block;
  padding: 0.55rem 0.8rem;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--color-text);
  white-space: nowrap;
}

.nav-dropdown-link:hover,
.nav-dropdown-link.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
}

.nav-toggle-bar {
  position: relative;
}

.nav-toggle-bar::before {
  position: absolute;
  top: -6px;
  left: 0;
}

.nav-toggle-bar::after {
  position: absolute;
  top: 6px;
  left: 0;
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }
  .nav-list {
    position: absolute;
    top: var(--nav-height);
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1.25rem 1rem;
    background: color-mix(in srgb, var(--color-bg) 96%, transparent);
    backdrop-filter: saturate(140%) blur(10px);
    -webkit-backdrop-filter: saturate(140%) blur(10px);
    border-bottom: 1px solid var(--color-border);
    display: none;
  }
  .nav-list.is-expanded {
    display: flex;
  }
  .nav-link {
    width: 100%;
    justify-content: space-between;
    padding: 0.75rem 0.5rem;
  }
  .nav-dropdown {
    position: static;
    min-width: 0;
    padding: 0 0 0.25rem 0.75rem;
    background: none;
    border: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }
  .has-dropdown.is-open > .nav-dropdown {
    display: block;
  }
}

/* ==================================================
========================= HERO ======================
================================================== */
.site-main {
  flex: 1;
}

.hero {
  position: relative;
  padding: clamp(4rem, 8vw, 7rem) 0 clamp(5rem, 10vw, 8rem);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--color-hero-accent);
  pointer-events: none;
}

.hero-grid {
  position: relative;
}

.hero-copy {
  max-width: 640px;
}

.hero-logo {
  width: clamp(96px, 12vw, 144px);
  height: clamp(96px, 12vw, 144px);
  border-radius: 50%;
  object-fit: cover;
  background: #0e0d0b;
  border: 1px solid var(--color-border-strong);
  box-shadow: 0 0 0 6px var(--color-primary-soft), var(--shadow-card);
  display: block;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.5rem, 1.6rem + 4vw, 4.75rem);
  line-height: 1.05;
  margin: 0 0 1rem;
}

.hero-lead {
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
  color: var(--color-text-soft);
  max-width: 56ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* ==================================================
======================= PROJECTS ====================
================================================== */
.projects {
  margin: 0 0 2rem;
}

.projects-title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.35rem);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 1rem;
}

.project-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-card);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.project-card:hover {
  border-color: var(--color-border-strong);
  background: var(--color-primary-soft);
  transform: translateY(-1px);
}

.project-logo-tile {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 96px;
  height: 56px;
  padding: 0.5rem 0.65rem;
  border-radius: 10px;
  background: #0e0d0b;
  border: 1px solid var(--color-border-strong);
}

.project-logo {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

.project-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.project-url {
  font-family: var(--font-display);
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.2rem);
  letter-spacing: 0.02em;
}

.project-desc {
  font-size: var(--fs-copy);
  color: var(--color-text-soft);
  line-height: 1.35;
}

/* ==================================================
======================= BUTTONS =====================
================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

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

/* ==================================================
======================= SOCIALS =====================
================================================== */
.socials {
  list-style: none;
  margin: 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.social-link:hover {
  border-color: var(--color-border-strong);
  background: var(--color-primary-soft);
  transform: translateY(-1px);
}

.social-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  filter: var(--icon-filter, none);
}

[data-theme="dark"] .social-icon {
  filter: invert(94%) sepia(7%) saturate(180%) hue-rotate(7deg) brightness(98%) contrast(93%);
}

[data-theme="light"] .social-icon {
  filter: invert(8%) sepia(7%) saturate(900%) hue-rotate(2deg) brightness(80%) contrast(92%);
}

/* ==================================================
======================= FOOTER ======================
================================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  background: var(--color-surface);
}

.site-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.site-footer-name {
  font-family: var(--font-display);
  color: var(--color-text);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: color 0.2s ease;
}

.site-footer-name:hover {
  color: var(--color-primary);
}

.site-footer-socials .social-link {
  width: 34px;
  height: 34px;
}

.site-footer-socials .social-icon {
  width: 16px;
  height: 16px;
}

/* ==================================================
=================== INTERIOR PAGES ===================
================================================== */
.page-head {
  padding: clamp(3rem, 7vw, 5rem) 0 clamp(1.5rem, 3vw, 2.5rem);
}

.page-title {
  font-size: clamp(2.2rem, 1.6rem + 3vw, 3.5rem);
  line-height: 1.05;
  margin: 0;
}

.page-lead {
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
  color: var(--color-text-soft);
  max-width: 56ch;
  margin: 0;
}

/* ==================================================
==================== CERTIFICATIONS ==================
================================================== */
.cert-section {
  padding: 0 0 clamp(4rem, 8vw, 7rem);
}

.cert-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.cert-list:empty {
  display: none;
}

.cert-card {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius-card);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.cert-badge {
  flex: none;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: #0e0d0b;
  border: 1px solid var(--color-border-strong);
}

.cert-badge-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.cert-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 0 0 0.2rem;
}

.cert-issuer {
  color: var(--color-text-soft);
  font-size: var(--fs-copy);
  margin: 0;
}

.cert-date {
  color: var(--color-text-muted);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0.25rem 0 0;
}

.cert-verify {
  display: inline-block;
  margin-top: 0.45rem;
  font-size: var(--fs-copy);
  color: var(--color-primary);
}

.cert-empty {
  color: var(--color-text-soft);
  font-style: italic;
  margin: 0;
}

/* Detailed credential write-up (program + internship style entries) */
.cert-detail {
  max-width: 720px;
}

.cert-detail-head {
  margin-bottom: 1.25rem;
}

.cert-detail-name {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 1.15rem + 1vw, 1.8rem);
  letter-spacing: 0.015em;
  text-transform: uppercase;
  margin: 0 0 0.3rem;
}

.cert-detail-sub {
  color: var(--color-text-muted);
  font-size: var(--fs-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0;
}

.cert-quote {
  margin: 1.75rem 0;
  padding: 1.1rem 1.4rem;
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  background: var(--color-surface);
}

.cert-quote p {
  margin: 0 0 0.6rem;
  color: var(--color-text-soft);
}

.cert-quote-source {
  color: var(--color-text-muted);
  font-size: var(--fs-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cert-subhead {
  font-family: var(--font-display);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  margin: 2.25rem 0 0.75rem;
}

.cert-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-copy);
}

.cert-table th {
  text-align: left;
  font-size: var(--fs-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--color-border-strong);
}

.cert-table td {
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.cert-table td:nth-child(2) {
  color: var(--color-text-muted);
  white-space: nowrap;
}

.cert-table th:last-child,
.cert-table td:last-child {
  text-align: right;
  white-space: nowrap;
}

.cert-docs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.cert-docs a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.cert-docs a::before {
  content: "↗";
  font-size: 0.85em;
  color: var(--color-text-muted);
}

.cert-docs a:hover {
  border-color: var(--color-border-strong);
  background: var(--color-primary-soft);
}

/* ==================================================
======================= MOBILE ======================
================================================== */
@media (max-width: 540px) {
  .site-footer-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .theme-toggle-label {
    display: none;
  }
  .theme-toggle {
    padding: 0.4rem 0.55rem;
  }
  .cert-table th,
  .cert-table td {
    padding: 0.4rem 0.45rem;
  }
}