/* ============================================================
   PORTFOLIO – style.css
   Minimal, modern, responsive personal portfolio styles
   ============================================================ */

/* ---------- CSS Custom Properties (Light – default) ---------- */
:root {
  --clr-bg:      #ffffff;
  --clr-bg-alt:  #f7f8fa;
  --clr-text:    #1a1a1a;
  --clr-muted:   #555555;
  --clr-accent:  #0f8a8a;          /* teal accent */
  --clr-accent-hover: #0b6e6e;
  --clr-border:  #e0e0e0;
  --clr-card-bg: #ffffff;
  --clr-header-bg: rgba(255, 255, 255, 0.95);
  --clr-overlay: rgba(0, 0, 0, 0.45);
  --clr-danger:  #d9534f;
  --clr-danger-hover: #c12e2a;

  --ff-body: "Inter", sans-serif;

  --fs-base:  1rem;       /* 16px */
  --fs-sm:    0.875rem;   /* 14px */
  --fs-lg:    1.125rem;   /* 18px */
  --fs-xl:    1.5rem;     /* 24px */
  --fs-2xl:   2rem;       /* 32px */
  --fs-3xl:   2.75rem;    /* 44px */

  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  --max-width: 1080px;
  --header-h:  64px;
  --radius:    8px;
  --transition: 0.25s ease;
}

/* ---------- Dark Theme ---------- */
[data-theme="dark"] {
  --clr-bg:      #121212;
  --clr-bg-alt:  #1a1a1a;
  --clr-text:    #e4e4e4;
  --clr-muted:   #a0a0a0;
  --clr-accent:  #2ec4b6;
  --clr-accent-hover: #26a69a;
  --clr-border:  #2a2a2a;
  --clr-card-bg: #1e1e1e;
  --clr-header-bg: rgba(18, 18, 18, 0.95);
  --clr-overlay: rgba(0, 0, 0, 0.65);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

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

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

ul {
  list-style: none;
}

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

/* ---------- Utility ---------- */
.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
}

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

.btn--primary {
  background-color: var(--clr-accent);
  color: #fff;
  border: 2px solid var(--clr-accent);
}

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

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

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

.btn--small {
  padding: 0.45rem 1.1rem;
  font-size: 0.8rem;
}

/* ==========================================================
   HEADER / NAVIGATION
   ========================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  background-color: var(--clr-header-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--clr-border);
  z-index: 100;
}

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

.nav__logo {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  letter-spacing: -0.5px;
}

.nav__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav__list {
  display: flex;
  gap: 2rem;
}

/* ---------- Theme Toggle ---------- */
.theme-toggle {
  background: none;
  border: 2px solid var(--clr-border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color var(--transition), background-color var(--transition);
}

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

.theme-toggle__icon {
  font-size: 1.15rem;
  line-height: 1;
  color: var(--clr-text);
  transition: color var(--transition);
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--clr-muted);
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--clr-accent);
}

/* Hamburger – hidden on desktop */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--clr-text);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  left: 0;
}

.hamburger::before { top: -7px; }
.hamburger::after  { top:  7px; }

/* Animate hamburger to X when open */
.nav__toggle.open .hamburger {
  background-color: transparent;
}

.nav__toggle.open .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.nav__toggle.open .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ==========================================================
   HERO
   ========================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
}

.hero__content {
  max-width: 640px;
}

.hero__greeting {
  font-size: var(--fs-lg);
  color: var(--clr-accent);
  font-weight: var(--fw-medium);
  margin-bottom: 0.25rem;
}

.hero__name {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  line-height: 1.15;
  margin-bottom: 0.5rem;
}

.hero__title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  color: var(--clr-muted);
  margin-bottom: 1rem;
}

.hero__description {
  font-size: var(--fs-lg);
  color: var(--clr-muted);
  margin-bottom: 2rem;
}

.hero__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ==========================================================
   SECTIONS (shared)
   ========================================================== */
.section {
  padding: 5rem 0;
}

.section--alt {
  background-color: var(--clr-bg-alt);
}

.section__title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  margin-bottom: 2.5rem;
  position: relative;
  display: inline-block;
}

.section__title::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 48px;
  height: 3px;
  background-color: var(--clr-accent);
  border-radius: 2px;
}

/* ==========================================================
   ABOUT
   ========================================================== */
.about__content {
  max-width: 680px;
}

.about__content p {
  color: var(--clr-muted);
  margin-bottom: 1rem;
}

.about__content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================
   SKILLS
   ========================================================== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.skills__card {
  background-color: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: box-shadow var(--transition);
}

.skills__card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.skills__category {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--clr-accent);
  margin-bottom: 0.75rem;
}

.skills__list li {
  font-size: var(--fs-sm);
  color: var(--clr-muted);
  padding: 0.3rem 0;
}

/* ==========================================================
   PROJECTS
   ========================================================== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project__card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: box-shadow var(--transition);
}

.project__card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.project__name {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: 0.5rem;
}

.project__description {
  font-size: var(--fs-sm);
  color: var(--clr-muted);
  margin-bottom: 1rem;
}

.project__stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: var(--fw-medium);
  color: var(--clr-accent);
  background-color: rgba(15, 138, 138, 0.08);
  padding: 0.25rem 0.65rem;
  border-radius: 50px;
}

.project__links {
  display: flex;
  gap: 0.75rem;
}

/* Edit button (top-right of each card) */
.project__edit {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: none;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-family: var(--ff-body);
  color: var(--clr-muted);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

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

/* Section header row (title + add button) */
.section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.section__header .section__title {
  margin-bottom: 0;
}

.btn--add {
  padding: 0.5rem 1.2rem;
  font-size: var(--fs-sm);
}

/* ---------- Danger button ---------- */
.btn--danger {
  background-color: var(--clr-danger);
  color: #fff;
  border: 2px solid var(--clr-danger);
}

.btn--danger:hover {
  background-color: var(--clr-danger-hover);
  border-color: var(--clr-danger-hover);
}

/* ==========================================================
   MODAL / FORM
   ========================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--clr-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background-color: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  width: 90%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
  transform: translateY(20px);
  transition: transform var(--transition);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.modal__title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
}

.modal__close {
  background: none;
  border: none;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--clr-muted);
  cursor: pointer;
  transition: color var(--transition);
}

.modal__close:hover {
  color: var(--clr-text);
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  margin-bottom: 0.35rem;
  color: var(--clr-text);
}

.form-hint {
  font-weight: var(--fw-regular);
  color: var(--clr-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-size: var(--fs-sm);
  font-family: var(--ff-body);
  color: var(--clr-text);
  background-color: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--clr-accent);
}

.modal__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ==========================================================
   CONTACT
   ========================================================== */
.contact__content {
  text-align: center;
  max-width: 540px;
  margin: 0 auto;
}

.contact__text {
  color: var(--clr-muted);
  margin-bottom: 2rem;
}

.contact__links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ==========================================================
   FOOTER
   ========================================================== */
.footer {
  padding: 2rem 0;
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--clr-muted);
  border-top: 1px solid var(--clr-border);
}

/* ==========================================================
   RESPONSIVE
   ========================================================== */

/* ---- Tablet (≤ 768px) ---- */
@media (max-width: 768px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero__name {
    font-size: var(--fs-2xl);
  }

  .hero__title {
    font-size: var(--fs-lg);
  }

  /* Show hamburger */
  .nav__toggle {
    display: block;
  }

  /* Move nav list into the right-side group on mobile */
  .nav__right {
    order: 2;
  }

  /* Mobile nav menu */
  .nav__list {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: 220px;
    height: calc(100vh - var(--header-h));
    flex-direction: column;
    background-color: var(--clr-bg);
    border-left: 1px solid var(--clr-border);
    padding: 2rem 1.5rem;
    gap: 1.25rem;
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .nav__list.show {
    transform: translateX(0);
  }
}

/* ---- Mobile (≤ 480px) ---- */
@media (max-width: 480px) {
  .skills__grid {
    grid-template-columns: 1fr;
  }

  .hero__buttons {
    flex-direction: column;
  }

  .hero__buttons .btn {
    text-align: center;
  }
}