/* 
  Base styles and layout
  - Dark theme
  - Typography
  - Components
*/

:root {
  --color-bg: #050816;
  --color-bg-alt: #0b1020;
  --color-surface: #111827;
  --color-surface-soft: #1f2937;
  --color-primary: #38bdf8;
  --color-primary-soft: rgba(56, 189, 248, 0.12);
  --color-primary-strong: #0ea5e9;
  --color-text: #e5e7eb;
  --color-text-soft: #9ca3af;
  --color-border: #1f2937;
  --color-danger: #f97373;

  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.8);
  --radius-lg: 18px;
  --radius-full: 999px;
  --nav-height: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: radial-gradient(circle at top left, #0f172a 0, #020617 40%, #000 100%);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

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

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

button,
input,
textarea {
  font-family: inherit;
}

.container {
  width: min(1120px, 100% - 3rem);
  margin: 0 auto;
}

main {
  padding-top: var(--nav-height);
}

/* Scroll to top button */

.scroll-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease,
    background 0.2s ease, border-color 0.2s ease;
  z-index: 30;
}

.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: rgba(15, 23, 42, 1);
  border-color: var(--color-primary);
}

/* Header / Navigation */

.header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  height: var(--nav-height);
  backdrop-filter: blur(22px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.98),
    rgba(15, 23, 42, 0.9),
    transparent
  );
  border-bottom: 1px solid rgba(31, 41, 55, 0.8);
  z-index: 40;
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.98rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.nav__logo span {
  color: var(--color-primary);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav__link {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  position: relative;
  padding-block: 0.25rem;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-strong));
  transition: width 0.25s ease;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__link--primary {
  border-radius: var(--radius-full);
  padding-inline: 1rem;
  padding-block: 0.48rem;
  background: var(--color-primary-soft);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.nav__link--primary::after {
  display: none;
}

.nav__link--primary:hover {
  background: rgba(56, 189, 248, 0.18);
  border-color: var(--color-primary-strong);
}

.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.9);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.22rem;
  cursor: pointer;
  padding: 0;
}

.nav__toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav__toggle.is-open span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Hero */

.hero {
  padding-block: 5.5rem 4.5rem;
}

.hero__content {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  align-items: center;
  gap: 3rem;
}

.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.hero__title {
  font-size: clamp(2.4rem, 3vw + 1.2rem, 3.3rem);
  margin: 0 0 0.5rem;
}

.hero__subtitle {
  margin: 0;
  color: var(--color-text-soft);
  max-width: 36rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.9rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-soft);
}

.hero__profile {
  position: relative;
  justify-self: center;
}

.hero__image-wrapper {
  width: 260px;
  aspect-ratio: 1;
  border-radius: 36% 64% 60% 40% / 44% 52% 48% 56%;
  background: radial-gradient(circle at 10% 20%, #38bdf8 0, #0f172a 45%, #020617 100%);
  padding: 4px;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.9);
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  filter: grayscale(0.1);
}

.hero__badge {
  position: absolute;
  left: -2rem;
  bottom: 1.5rem;
  padding: 0.75rem 0.9rem;
  border-radius: 1rem;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.35);
  backdrop-filter: blur(18px);
  max-width: 190px;
  box-shadow: var(--shadow-soft);
}

.hero__badge span {
  display: inline-block;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.2rem;
}

.hero__badge p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-text-soft);
}

/* Sections */

.section {
  padding-block: 4.5rem;
}

.section--alt {
  background: radial-gradient(circle at top, #020617 0, #020617 10%, #030712 40%, #020617 100%);
}

.section__content {
  display: grid;
  gap: 2.5rem;
}

.section__content--split {
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.1fr);
  align-items: center;
}

.section__content--reverse {
  direction: rtl;
}

.section__content--reverse > * {
  direction: ltr;
}

.section__header {
  max-width: 30rem;
}

.section__header--center {
  max-width: 36rem;
  margin-inline: auto;
  text-align: center;
}

.section__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}

.section__title {
  margin: 0 0 0.5rem;
  font-size: 1.8rem;
}

.section__subtitle {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.94rem;
}

.section__subtitle--center {
  max-width: 32rem;
  margin-inline: auto;
}

/* About */

.about__details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
}

.about__item h3 {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.about__item p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.about__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.35rem;
  color: var(--color-text-soft);
  font-size: 0.93rem;
}

.about__list li::before {
  content: "•";
  color: var(--color-primary);
  margin-right: 0.35rem;
}

/* Skills */

.skills__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
  margin-top: 2.2rem;
}

.skills__group h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

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

.tag {
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.skills__bars {
  margin-top: 2.5rem;
  display: grid;
  gap: 1rem;
}

.skill__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.skill__bar {
  position: relative;
  overflow: hidden;
  height: 8px;
  border-radius: 999px;
  background: rgba(31, 41, 55, 0.9);
}

.skill__bar-fill {
  position: absolute;
  inset-block: 0;
  left: 0;
  width: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-strong));
  border-radius: inherit;
  transition: width 1.2s ease-out;
}

.skill__bar-fill.is-animated {
  width: var(--skill-target, 0);
}

/* Projects */

.projects__filters {
  display: inline-flex;
  gap: 0.5rem;
  padding: 0.3rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(31, 41, 55, 0.9);
  background: rgba(15, 23, 42, 0.9);
  margin-top: 2rem;
}

.projects__filter-btn {
  border: none;
  background: transparent;
  color: var(--color-text-soft);
  font-size: 0.82rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.projects__filter-btn--active {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
  margin-top: 2.2rem;
}

.card {
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, #020617 0, #020617 25%, #020617 100%);
  border: 1px solid rgba(31, 41, 55, 0.9);
  box-shadow: var(--shadow-soft);
  padding: 1.1rem 1.2rem;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: -60%;
  background: radial-gradient(
    circle at top left,
    rgba(56, 189, 248, 0.12),
    transparent 55%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.card:hover::before {
  opacity: 1;
}

.project__image-wrapper {
  border-radius: 1rem;
  overflow: hidden;
  margin-bottom: 0.95rem;
}

.project__image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project:hover .project__image {
  transform: scale(1.04);
}

.project__title {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.project__description {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.9rem;
}

.project__tags {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--color-text-soft);
}

.project__tags li {
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(31, 41, 55, 0.9);
}

.project__links {
  display: flex;
  gap: 0.8rem;
  font-size: 0.85rem;
}

.project__link {
  color: var(--color-primary-strong);
}

.project__link:hover {
  text-decoration: underline;
}

.project.is-hidden {
  display: none;
}

/* Testimonials */

.testimonials {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
}

.testimonials__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  width: 100%;
  overflow: hidden;
}

.testimonial {
  opacity: 0;
  transform: translateX(12px) scale(0.98);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.testimonial.is-active {
  opacity: 1;
  transform: translateX(0) scale(1);
}

.testimonial__text {
  margin: 0 0 0.9rem;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.testimonial__meta h3 {
  margin: 0;
  font-size: 0.96rem;
}

.testimonial__meta p {
  margin: 0.15rem 0 0;
  font-size: 0.85rem;
  color: var(--color-text-soft);
}

.testimonials__control {
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.9);
  color: var(--color-text-soft);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
}

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

/* Services */

.services__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.service__icon {
  width: 40px;
  height: 40px;
  border-radius: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.9);
  margin-bottom: 0.7rem;
}

.service__title {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.service__text {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.9rem;
}

/* Contact */

.contact__details {
  margin-top: 1.75rem;
  display: grid;
  gap: 0.9rem;
}

.contact__item {
  display: grid;
  gap: 0.2rem;
}

.contact__label {
  font-size: 0.8rem;
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.contact__value {
  font-size: 0.95rem;
}

.contact__social {
  display: flex;
  gap: 0.8rem;
  font-size: 0.9rem;
}

.contact__social a {
  color: var(--color-primary-strong);
}

.contact__social a:hover {
  text-decoration: underline;
}

.contact__form-wrapper {
  padding: 1.5rem 1.6rem;
  border-radius: var(--radius-lg);
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(31, 41, 55, 0.9);
  box-shadow: var(--shadow-soft);
}

.form {
  display: grid;
  gap: 1rem;
}

.form__group {
  display: grid;
  gap: 0.35rem;
}

.form label {
  font-size: 0.85rem;
}

.form input,
.form textarea {
  border-radius: 0.9rem;
  border: 1px solid rgba(31, 41, 55, 0.9);
  background: rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  padding: 0.65rem 0.8rem;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  resize: vertical;
}

.form input:focus,
.form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4);
}

.form__error {
  min-height: 1em;
  font-size: 0.78rem;
  color: var(--color-danger);
}

.form__success {
  min-height: 1em;
  font-size: 0.85rem;
  color: #4ade80;
}

.form--invalid input,
.form--invalid textarea {
  border-color: rgba(248, 113, 113, 0.8);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  padding: 0.6rem 1.4rem;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  background: transparent;
  color: var(--color-text);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease,
    transform 0.1s ease;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #0b1120;
  box-shadow: 0 18px 30px rgba(56, 189, 248, 0.25);
}

.btn--primary:hover {
  transform: translateY(-1px);
}

.btn--ghost {
  border-color: rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.7);
  color: var(--color-text-soft);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

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

/* Footer */

.footer {
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  padding-block: 1.5rem 2rem;
  background: #020617;
}

.footer__content {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-soft);
}

/* Scroll animations */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}