/* ================================================================
   portfolio — css/base.css
   Базовые стили, CSS-переменные (значения по умолчанию), layout
   ================================================================ */

/* ---------- CSS VARIABLES (переопределяются в themes.css) -------- */
:root {
  /* palette */
  --c-bg: #0d0d0d;
  --c-bg-alt: #161616;
  --c-surface: rgba(255, 255, 255, 0.05);
  --c-surface-hover: rgba(255, 255, 255, 0.1);
  --c-border: rgba(255, 255, 255, 0.12);
  --c-text: #e0e0e0;
  --c-text-secondary: #a0a0a0;
  --c-accent: #0fba81;
  --c-accent-secondary: #0e9c6a;
  --c-shadow: rgba(0, 0, 0, 0.3);

  /* fonts */
  --ff-body: "Inter", system-ui, -apple-system, sans-serif;
  --ff-heading: "Space Grotesk", "Inter", system-ui, sans-serif;
  --ff-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;

  /* sizes */
  --max-width: 820px;
  --radius: 12px;
  --radius-sm: 8px;

  /* transitions */
  --ease: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- RESET / BASE ---------- */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--ff-body);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  min-height: 100vh;
  transition: background var(--ease), color var(--ease);
}

a {
  color: var(--c-accent);
  text-decoration: none;
  transition: color var(--ease);
}
a:hover {
  color: var(--c-accent-secondary);
}

ul {
  list-style: none;
}

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

/* ---------- CONTAINER ---------- */

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

/* ---------- SECTION ---------- */

.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--c-border);
}

.section__title {
  font-family: var(--ff-heading);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 28px;
  position: relative;
}

/* ---------- THEME SWITCHER ---------- */

.theme-switcher {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--c-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 8px 12px;
  transition: background var(--ease), border var(--ease);
}

.theme-switcher__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.theme-switcher__btns {
  display: flex;
  gap: 4px;
}

.theme-btn {
  width: 32px;
  height: 32px;
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--c-text-secondary);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--ease);
}

.theme-btn:hover {
  background: var(--c-surface-hover);
  color: var(--c-text);
}

.theme-btn.active {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: rgba(15, 186, 129, 0.15);
}

/* ---------- HERO ---------- */

.hero {
  padding: 72px 0 48px;
  text-align: center;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.hero__img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--c-border);
  box-shadow: 0 8px 32px var(--c-shadow);
}

.hero__name {
  font-family: var(--ff-heading);
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero__sub {
  color: var(--c-text-secondary);
  font-size: 1rem;
  max-width: 500px;
}

.hero__links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 28px;
}

.hero__link {
  display: inline-block;
  padding: 8px 20px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--ease);
}

.hero__link:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

/* ---------- ABOUT ---------- */

.about__content p {
  margin-bottom: 12px;
  color: var(--c-text);
  font-size: 1rem;
}

/* ---------- WHAT I DO ---------- */

.whatido__intro,
.whatido__outro {
  color: var(--c-text-secondary);
  margin-bottom: 20px;
}

.whatido__list {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.whatido__list > li {
  padding: 12px 16px;
  background: var(--c-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  font-size: 0.95rem;
  transition: background var(--ease);
}

.whatido__list > li:hover {
  background: var(--c-surface-hover);
}

.whatido__list ul {
  margin-top: 8px;
  margin-left: 20px;
  display: grid;
  gap: 6px;
}

.whatido__list ul li {
  font-size: 0.88rem;
  color: var(--c-text-secondary);
  list-style: disc;
}

/* ---------- PROJECTS ---------- */

.projects__intro {
  color: var(--c-text-secondary);
  margin-bottom: 20px;
}

.proj__item {
  padding: 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  transition: background var(--ease);
}

.proj__item:hover {
  background: var(--c-surface-hover);
}

.proj__link,
.proj__name {
  font-weight: 600;
  font-size: 0.98rem;
  display: block;
  margin-bottom: 4px;
}

.proj__note {
  font-size: 0.85rem;
  color: var(--c-text-secondary);
  font-style: italic;
}

.proj__sublist {
  margin-top: 8px;
  margin-left: 20px;
  display: grid;
  gap: 6px;
}

.proj__sublist li {
  font-size: 0.88rem;
  color: var(--c-text-secondary);
  list-style: disc;
}

.proj__sublink {
  font-size: 0.88rem;
}

/* ---------- EXPERIENCE ---------- */

.experience__intro,
.experience__outro {
  color: var(--c-text-secondary);
  margin-bottom: 16px;
}

.experience__list li {
  padding: 10px 16px;
  background: var(--c-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  margin-bottom: 8px;
  font-size: 0.95rem;
  transition: background var(--ease);
}

.experience__list li:hover {
  background: var(--c-surface-hover);
}

/* ---------- LEARNING ---------- */

.learning__intro {
  color: var(--c-text-secondary);
  margin-bottom: 20px;
}

.learning__courses {
  display: grid;
  gap: 12px;
}

.course-card {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  gap: 12px;
  padding: 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  align-items: center;
  transition: background var(--ease);
}

.course-card:hover {
  background: var(--c-surface-hover);
}

.course-card__date {
  color: var(--c-accent);
  font-weight: 500;
  font-size: 0.82rem;
}

.course-card__org {
  font-weight: 600;
}

.course-card__desc {
  color: var(--c-text-secondary);
}

/* ---------- SKILLS ---------- */

.skills__grid {
  display: grid;
  gap: 24px;
}

.skills__label {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--c-text-secondary);
}

.skills__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-family: var(--ff-mono);
  transition: all var(--ease);
}

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

/* ---------- WORK HISTORY ---------- */

.wh__item {
  display: grid;
  grid-template-columns: 1fr 2fr 3fr;
  gap: 12px;
  padding: 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  align-items: center;
  font-size: 0.92rem;
  transition: background var(--ease);
}

.wh__item:hover {
  background: var(--c-surface-hover);
}

.wh__date {
  color: var(--c-accent);
  font-weight: 500;
  font-size: 0.82rem;
}

.wh__role {
  font-weight: 600;
}

.wh__desc {
  color: var(--c-text-secondary);
}

/* ---------- CERTIFICATES ---------- */

.certs__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.cert-card {
  cursor: pointer;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--c-border);
  transition: transform var(--ease), box-shadow var(--ease);
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px var(--c-shadow);
}

.cert-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

/* ---------- LIGHTBOX ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ease);
}

.lightbox[aria-hidden="false"] {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 2rem;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  z-index: 2001;
  line-height: 1;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
}

/* ---------- PLAYLIST ---------- */

.playlist__desc {
  margin-bottom: 20px;
}

.playlist__desc p {
  color: var(--c-text-secondary);
  margin-bottom: 8px;
}

.playlist__tracks {
  display: grid;
  gap: 8px;
}

.track-card {
  display: grid;
  grid-template-columns: 40px 1fr 60px;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--ease);
}

.track-card:hover {
  background: var(--c-surface-hover);
  border-color: var(--c-accent);
}

.track-card__num {
  font-family: var(--ff-mono);
  font-size: 0.85rem;
  color: var(--c-accent);
  font-weight: 600;
}

.track-card__title {
  font-weight: 500;
  font-size: 0.95rem;
}

.track-card__dur {
  font-family: var(--ff-mono);
  font-size: 0.82rem;
  color: var(--c-text-secondary);
  text-align: right;
}

/* ---------- AUDIO BAR ---------- */

.audio-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1500;
  background: var(--c-bg-alt);
  border-top: 1px solid var(--c-border);
  padding: 10px 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(100%);
  transition: all var(--ease);
}

.audio-bar[aria-hidden="false"] {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.audio-bar__inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.audio-bar__track-title {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

/* кастомный аудио-плеер */
.ap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 600px;
  height: 36px;
}

.ap__play {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--c-text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: color var(--ease);
}

.ap__play:hover {
  color: var(--c-accent);
}

.ap__icon {
  display: none;
}

.ap__icon--play {
  display: block;
}

.ap__icon--pause {
  display: none;
}

.ap--playing .ap__icon--play {
  display: none;
}

.ap--playing .ap__icon--pause {
  display: block;
}

.ap__time {
  font-size: 0.78rem;
  font-family: var(--ff-mono);
  color: var(--c-text-secondary);
  white-space: nowrap;
  min-width: 38px;
  text-align: center;
  flex-shrink: 0;
}

.ap__progress {
  flex: 1;
  position: relative;
  height: 6px;
  cursor: pointer;
  min-width: 60px;
}

.ap__progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: var(--c-accent);
  border-radius: 3px;
  pointer-events: none;
  transition: width 0.1s linear;
}

.ap__progress-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  margin: 0;
}

.ap__volume {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.ap__volume-icon {
  font-size: 0.9rem;
  cursor: default;
  user-select: none;
  flex-shrink: 0;
}

.ap__volume-input {
  width: 72px;
  height: 4px;
  accent-color: var(--c-accent);
  cursor: pointer;
}

.audio-bar__close {
  background: none;
  border: 1px solid var(--c-border);
  color: var(--c-text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--ease);
}

.audio-bar__close:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* ---------- FOOTER ---------- */

.footer {
  padding: 32px 0;
  text-align: center;
  color: var(--c-text-secondary);
  font-size: 0.85rem;
}

/* ---------- RESPONSIVE ---------- */

@media (max-width: 640px) {
  .section {
    padding: 40px 0;
  }

  .section__title {
    font-size: 1.4rem;
  }

  .hero__name {
    font-size: 1.8rem;
  }

  .hero__img {
    width: 100px;
    height: 100px;
  }

  .theme-switcher {
    top: 8px;
    right: 8px;
    padding: 6px 10px;
  }

  .theme-switcher__label {
    display: none;
  }

  .theme-btn {
    width: 28px;
    height: 28px;
    font-size: 0.85rem;
  }

  .course-card {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .wh__item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .certs__grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .audio-bar__inner {
    flex-wrap: wrap;
    gap: 8px;
  }

  .audio-bar__track-title {
    max-width: 100%;
  }
}