/* ==========================================================================
   Data Analyst & Science Developer — Portfolio Stylesheet
   ========================================================================== */

:root {
  --color-bg: #0a0f1e;
  --color-bg-alt: #0d1426;
  --color-surface: #111a30;
  --color-surface-alt: #16213b;
  --color-border: #223052;
  --color-text: #e8edf7;
  --color-text-muted: #93a1c2;
  --color-text-faint: #64729a;
  --color-white: #ffffff;
  --color-accent: #22e8f0;
  --color-accent-2: #7c5cff;
  --color-accent-soft: rgba(34, 232, 240, 0.12);

  --font-heading: 'Poppins', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;

  --shadow-soft: 0 20px 60px -20px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 0 1px rgba(34, 232, 240, 0.15), 0 20px 50px -15px rgba(34, 232, 240, 0.25);

  --container-width: 1180px;
  --transition: 220ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button,
input,
textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 110px 0;
  position: relative;
}

.text-gradient {
  background: linear-gradient(120deg, var(--color-accent), var(--color-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-eyebrow {
  font-family: var(--font-heading) !important;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  color: var(--color-white);
  margin-bottom: 16px;
}

.section-lead {
  max-width: 620px;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 56px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 30px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading) !important;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(120deg, var(--color-accent), #17b8c4);
  color: #04121a;
  box-shadow: 0 10px 30px -8px rgba(34, 232, 240, 0.55);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px -10px rgba(34, 232, 240, 0.7);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn--small {
  padding: 10px 22px;
  font-size: 0.85rem;
}

.btn--full {
  width: 100%;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(10, 15, 30, 0.75);
  border-bottom: 1px solid var(--color-border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  line-height: 1.15;
  white-space: nowrap;
}

.logo__mark {
  font-family: var(--font-heading) !important;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

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

.logo__sub {
  font-family: var(--font-heading) !important;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.navbar__right {
  display: flex;
  align-items: center;
  gap: 28px;
}

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

.nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav a:hover {
  color: var(--color-white);
}

.nav__cta {
  margin-left: 12px;
}

/* ---------- Language switcher ---------- */
.lang-switch {
  position: relative;
}

.lang-switch__toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-heading) !important;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}

.lang-switch__toggle svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition);
}

.lang-switch__toggle:hover,
.lang-switch:focus-within .lang-switch__toggle,
.lang-switch.is-open .lang-switch__toggle {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.lang-switch:hover .lang-switch__toggle svg,
.lang-switch:focus-within .lang-switch__toggle svg,
.lang-switch.is-open .lang-switch__toggle svg {
  transform: rotate(180deg);
}

.lang-switch__menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 170px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 200;
}

.lang-switch:hover .lang-switch__menu,
.lang-switch:focus-within .lang-switch__menu,
.lang-switch.is-open .lang-switch__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switch__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}

.lang-switch__item:hover {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.lang-switch__item.is-active {
  color: var(--color-accent);
  font-weight: 600;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 70px 0 110px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(600px circle at 15% 20%, rgba(34, 232, 240, 0.14), transparent 60%),
    radial-gradient(700px circle at 85% 15%, rgba(124, 92, 255, 0.16), transparent 60%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero__bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading) !important;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 16px;
  border: 1px solid rgba(34, 232, 240, 0.3);
  border-radius: var(--radius-full);
  background: var(--color-accent-soft);
  margin-bottom: 26px;
}

.hero__text h1 {
  font-size: clamp(2.4rem, 4.6vw, 3.6rem);
  color: var(--color-white);
  margin-bottom: 22px;
}

.hero__desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 540px;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.hero__media {
  display: flex;
  justify-content: center;
}

.hero__image-frame {
  position: relative;
  width: min(100%, 340px);
  aspect-ratio: 1 / 1;
}

.profile-placeholder {
  width: 100%;
  height: 100%;
  border-radius: 32px;
  overflow: hidden;
  background: linear-gradient(155deg, var(--color-surface), var(--color-surface-alt));
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-faint);
}

.profile-placeholder__img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.badge-chip {
  position: absolute;
  font-family: var(--font-heading) !important;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-white);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-soft);
  animation: float 5s ease-in-out infinite;
}

.badge-chip--1 {
  top: 6%;
  left: -10%;
  animation-delay: 0s;
}

.badge-chip--2 {
  bottom: 14%;
  right: -12%;
  animation-delay: 1.2s;
}

.badge-chip--3 {
  bottom: -6%;
  left: 12%;
  animation-delay: 2.4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- About ---------- */
.about {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 232, 240, 0.35);
  box-shadow: var(--shadow-glow);
}

.service-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.service-card__icon svg {
  width: 26px;
  height: 26px;
}

.service-card h3 {
  font-size: 1.1rem;
  color: var(--color-white);
  margin-bottom: 10px;
}

.service-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.skills-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.skill-chip {
  font-family: var(--font-heading) !important;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  padding: 9px 18px;
  border-radius: var(--radius-full);
  transition: border-color var(--transition), color var(--transition);
}

.skill-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- Portfolio ---------- */
.portfolio__category {
  margin-bottom: 60px;
}

.portfolio__category:last-child {
  margin-bottom: 0;
}

.portfolio__category-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  color: var(--color-white);
  margin-bottom: 26px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.category-icon {
  font-size: 1.2rem;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.portfolio-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(34, 232, 240, 0.35);
}

.portfolio-card__thumb {
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading) !important;
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.85);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}

.portfolio-card__thumb--excel {
  height: 240px;
  background-image: linear-gradient(135deg, #14733a, #1f9d52, #14733a);
}

.portfolio-card__thumb--app {
  background-image: linear-gradient(135deg, #1c3fae, #7c5cff, #1c3fae);
}

.portfolio-card__thumb--web {
  background-image: linear-gradient(135deg, #0f6f78, #22e8f0, #0f6f78);
  color: #04121a;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.portfolio-card__body {
  padding: 24px;
}

.portfolio-card__body h4 {
  font-size: 1.05rem;
  color: var(--color-white);
  margin-bottom: 10px;
}

.portfolio-card__body p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

/* ---------- Portfolio flip cards ---------- */
.portfolio-card--flip {
  background: transparent;
  border: none;
  overflow: visible;
  perspective: 1400px;
  min-height: 420px;
}

.portfolio-card--flip:hover {
  transform: none;
  box-shadow: none;
  border-color: transparent;
}

.flip-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 420px;
  transition: transform 1.1s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d;
}

.portfolio-card--flip:hover .flip-card__inner,
.portfolio-card--flip:focus-within .flip-card__inner {
  transform: rotateY(180deg);
}

.flip-card__front,
.flip-card__back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.portfolio-card--flip:hover .flip-card__front,
.portfolio-card--flip:hover .flip-card__back {
  border-color: rgba(34, 232, 240, 0.35);
  box-shadow: var(--shadow-glow);
}

.flip-card__back {
  transform: rotateY(180deg);
  justify-content: center;
}

.flip-card__back .portfolio-card__body p {
  margin-bottom: 8px;
}

.portfolio-card--flip .portfolio-card__body {
  text-align: center;
}

.portfolio-card--flip .portfolio-card__body p {
  text-align: left;
}

.portfolio-card--flip .flip-card__front .portfolio-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
}

.portfolio-card--flip .portfolio-link {
  justify-content: center;
}

.portfolio-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading) !important;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: gap var(--transition);
}

.portfolio-link:hover {
  gap: 10px;
}

/* ---------- Contact ---------- */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact .section-lead {
  margin-bottom: 40px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--color-text);
  padding: 14px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
}

.contact-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateX(6px);
}

.contact-links__icon {
  font-size: 1.1rem;
}

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-row label {
  font-family: var(--font-heading) !important;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.form-row input,
.form-row textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

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

.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(34, 232, 240, 0.15);
}

.contact-form__hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
}

.form-status--success {
  background: rgba(34, 232, 240, 0.12);
  border: 1px solid rgba(34, 232, 240, 0.35);
  color: var(--color-accent);
}

.form-status--error {
  background: rgba(255, 92, 92, 0.12);
  border: 1px solid rgba(255, 92, 92, 0.35);
  color: #ff8a8a;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

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

.footer__inner p {
  font-size: 0.85rem;
  color: var(--color-text-faint);
}

.footer__socials {
  display: flex;
  gap: 18px;
  font-size: 1.1rem;
}

.footer__socials a {
  opacity: 0.8;
  transition: opacity var(--transition), transform var(--transition);
}

.footer__socials a:hover {
  opacity: 1;
  transform: translateY(-3px);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 992px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__media {
    order: -1;
  }

  .hero__image-frame {
    width: 240px;
    margin: 0 auto;
  }

  .hero__text {
    text-align: center;
  }

  .hero__desc {
    margin-inline: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .about__grid,
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .section-eyebrow,
  .section-title,
  .section-lead {
    text-align: center;
  }

  .section-lead {
    margin-inline: auto;
  }

  .portfolio__category-title {
    justify-content: center;
  }
}

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

  .logo__mark {
    font-size: 1.05rem;
  }

  .section {
    padding: 80px 0;
  }

  .hero {
    padding: 50px 0 80px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__stats {
    gap: 28px;
  }

  .about__grid,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 26px;
  }

  .footer__inner {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 560px) {
  /* Below this width, logo + lang switch + CTA no longer fit on one row
     and the fixed-height navbar would clip whatever overflows; let it
     wrap onto a second, centered row instead of cutting content off. */
  .navbar__inner {
    height: auto;
    flex-wrap: wrap;
    justify-content: center;
    row-gap: 10px;
    padding: 14px 0;
  }

  .navbar__right {
    justify-content: center;
    flex-wrap: wrap;
    row-gap: 10px;
  }

  .nav__cta {
    margin-left: 0;
  }
}

@media (max-width: 420px) {
  .container {
    padding: 0 18px;
  }

  .badge-chip {
    font-size: 0.72rem;
    padding: 6px 12px;
  }

  .hero__image-frame {
    width: 190px;
  }
}