/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root,
[data-theme="dark"] {
  --clr-bg: #0f1117;
  --clr-surface: #1a1d27;
  --clr-surface-2: #22263a;
  --clr-accent: #6c63ff;
  --clr-accent-hover: #8a83ff;
  --clr-text: #e2e8f0;
  --clr-text-muted: #8892a4;
  --clr-border: #2d3250;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --transition: 0.25s ease;
  --nav-height: 68px;
  --clr-navbar: rgba(15, 17, 23, 0.85);
  --clr-navbar-scrolled: rgba(15, 17, 23, 0.97);
}

[data-theme="light"] {
  --clr-bg: #f4f6fb;
  --clr-surface: #ffffff;
  --clr-surface-2: #eef0f7;
  --clr-accent: #6c63ff;
  --clr-accent-hover: #5a52e0;
  --clr-text: #1a1d27;
  --clr-text-muted: #5a6178;
  --clr-border: #dde1ef;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --clr-navbar: rgba(244, 246, 251, 0.85);
  --clr-navbar-scrolled: rgba(244, 246, 251, 0.97);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--clr-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--clr-accent-hover);
  box-shadow: 0 6px 20px rgba(108, 99, 255, 0.45);
}

.btn--outline {
  background: transparent;
  color: var(--clr-text);
  border: 2px solid var(--clr-border);
}

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

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

/* ===== SECTION TITLES ===== */
.section__title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section__subtitle {
  color: var(--clr-text-muted);
  text-align: center;
  margin-bottom: 3rem;
  font-size: 1.05rem;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: var(--clr-navbar);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
  z-index: 1000;
  transition: background var(--transition);
}

.navbar--scrolled {
  background: var(--clr-navbar-scrolled) !important;
}

.navbar__container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#navbar__logo {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #fff 40%, var(--clr-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar__menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.navbar__links {
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: color var(--transition), background var(--transition);
}

.navbar__links:hover,
.navbar__links--active {
  color: var(--clr-text);
  background: var(--clr-surface);
}

.navbar__links--cta {
  background: var(--clr-accent);
  color: #fff !important;
  margin-left: 0.5rem;
}

.navbar__links--cta:hover {
  background: var(--clr-accent-hover);
}

/* Hamburger */
.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: background var(--transition);
}

.navbar__toggle:hover {
  background: var(--clr-surface);
}

.bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.navbar__toggle.active .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar__toggle.active .bar:nth-child(2) {
  opacity: 0;
}

.navbar__toggle.active .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + 2rem) 1.5rem 4rem;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(108, 99, 255, 0.15) 0%, transparent 70%);
  position: relative;
}

.hero__content {
  max-width: 700px;
}

.hero__greeting {
  font-size: 1.1rem;
  color: var(--clr-accent);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.hero__name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.05;
  background: linear-gradient(135deg, #fff 30%, var(--clr-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}

.hero__title {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 400;
  color: var(--clr-text-muted);
  margin-bottom: 1rem;
}

.hero__subtitle {
  font-size: 1.1rem;
  color: var(--clr-text-muted);
  max-width: 500px;
  margin: 0 auto 2.5rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.hero__scroll-hint span {
  display: block;
  width: 24px;
  height: 38px;
  border: 2px solid var(--clr-border);
  border-radius: 20px;
  position: relative;
}

.hero__scroll-hint span::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--clr-accent);
  border-radius: 4px;
  animation: scroll-hint 1.5s infinite;
}

@keyframes scroll-hint {
  0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.3; transform: translateX(-50%) translateY(8px); }
}

/* ===== ABOUT ===== */
.about {
  padding: 7rem 0;
  background: var(--clr-surface);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}

.about__text p {
  color: var(--clr-text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.stat {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem 1rem;
  text-align: center;
}

.stat__number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-accent);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat__label {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== PROJECTS ===== */
.projects {
  padding: 7rem 0;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.project-card__icon {
  font-size: 2rem;
}

.project-card__links {
  display: flex;
  gap: 0.75rem;
}

.project-card__link {
  color: var(--clr-text-muted);
  transition: color var(--transition);
}

.project-card__link:hover {
  color: var(--clr-accent);
}

.project-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.project-card__desc {
  color: var(--clr-text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

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

.tag {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  font-size: 0.78rem;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  font-weight: 500;
}

/* ===== CONTACT ===== */
.contact {
  padding: 7rem 0;
  background: var(--clr-surface);
}

.contact__form {
  max-width: 640px;
  margin: 0 auto;
}

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

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.form__group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text-muted);
}

.form__group input,
.form__group textarea {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  resize: vertical;
}

.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--clr-accent);
}

.form__group input::placeholder,
.form__group textarea::placeholder {
  color: var(--clr-text-muted);
  opacity: 0.6;
}

.form__status {
  text-align: center;
  margin-top: 1rem;
  font-size: 0.9rem;
  min-height: 1.4em;
}

.form__status--success { color: #4ade80; }
.form__status--error   { color: #f87171; }

/* ===== FOOTER ===== */
.footer {
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  padding: 2.5rem 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__name {
  font-weight: 700;
  font-size: 1.1rem;
}

.footer__social {
  display: flex;
  gap: 1rem;
}

.footer__social-link {
  color: var(--clr-text-muted);
  transition: color var(--transition);
}

.footer__social-link:hover {
  color: var(--clr-accent);
}

.footer__copy {
  color: var(--clr-text-muted);
  font-size: 0.85rem;
}

/* ===== PAGE HERO (tech.html) ===== */
.page-hero {
  padding: calc(var(--nav-height) + 4rem) 1.5rem 3rem;
  text-align: center;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(108, 99, 255, 0.12) 0%, transparent 70%);
}

.page-hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 0.5rem;
}

.page-hero__subtitle {
  color: var(--clr-text-muted);
  font-size: 1.1rem;
}

/* ===== TECH SECTION ===== */
.tech-section {
  padding: 4rem 0 7rem;
}

.tech-category {
  margin-bottom: 4rem;
}

.tech-category__title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1.25rem;
}

.tech-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}

.tech-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-3px);
}

.tech-card__icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  display: block;
}

.tech-card__name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.tech-card__desc {
  color: var(--clr-text-muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
  line-height: 1.55;
}

.tech-card__level {
  height: 4px;
  background: var(--clr-surface-2);
  border-radius: 4px;
  overflow: hidden;
}

.level-bar {
  height: 100%;
  width: var(--level);
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-hover));
  border-radius: 4px;
  animation: grow-bar 1s ease forwards;
  transform-origin: left;
}

@keyframes grow-bar {
  from { width: 0; }
  to   { width: var(--level); }
}

.tech-cta {
  text-align: center;
  margin-top: 2rem;
  padding: 3rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
}

.tech-cta p {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--clr-text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .navbar__toggle {
    display: flex;
  }

  .navbar__menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    gap: 0.25rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
  }

  .navbar__menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .navbar__links {
    padding: 0.75rem 1rem;
    display: block;
  }

  .navbar__links--cta {
    margin-left: 0;
    text-align: center;
    margin-top: 0.25rem;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about__stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

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

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  background: none;
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  color: var(--clr-text-muted);
  cursor: pointer;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color var(--transition), border-color var(--transition);
}

.theme-toggle:hover {
  color: var(--clr-accent);
  border-color: var(--clr-accent);
}

.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun  { display: none; }

[data-theme="light"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun  { display: block; }

/* ===== AUTH NAV ITEMS ===== */
.nav-auth {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-auth__email {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn--ghost {
  background: none;
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  color: var(--clr-text-muted);
  padding: 0.35rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: border-color var(--transition), color var(--transition);
}

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

/* ===== SERVICES ===== */
.services {
  padding: 7rem 0;
  background: var(--clr-bg);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.service-card--featured {
  border-color: var(--clr-accent);
}

.service-card__badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--clr-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  white-space: nowrap;
}

.service-card__icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.service-card__name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.service-card__desc {
  color: var(--clr-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.service-card__price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--clr-accent);
  margin-bottom: 1.5rem;
  line-height: 1;
}

.service-card__price sub {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  vertical-align: baseline;
}

.service-card__features {
  list-style: none;
  margin-bottom: 2rem;
  flex: 1;
}

.service-card__features li {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.service-card__features li::before {
  content: '✓';
  color: var(--clr-accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== AUTH PAGES ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + 2rem) 1.5rem 4rem;
  background: radial-gradient(ellipse 70% 50% at 50% 0%, rgba(108, 99, 255, 0.12) 0%, transparent 70%);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.auth-card__title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.auth-card__subtitle {
  color: var(--clr-text-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.auth-card__switch {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--clr-text-muted);
}

.auth-card__switch a {
  color: var(--clr-accent);
  font-weight: 600;
}

.auth-card__switch a:hover {
  text-decoration: underline;
}

.auth__error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: #f87171;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  display: none;
}

.auth__error.visible { display: block; }

/* Disable submit button when form has empty required fields */
#signup-form:invalid #creatUserSubmitBtn {
  opacity: 0.45;
  pointer-events: none;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}