/* ==========================================================
   Variables
   ========================================================== */
:root {
  color-scheme: light;

  --color-white: #ffffff;
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-ink: #111111;
  --color-text: #3a3a3a;
  --color-muted: #8a8a8a;
  --color-header: #3d3d3d;
  --color-border: #dcdcdc;
  --color-hover: #f3f6fd;
  --color-blue: #3b6fe0;
  --color-error: #c0392b;
  --color-sky-soft: #9fc0fa;
  --color-sky: #6d9bf5;
  --color-sky-deep: #3b6fe0;

  --font-main: "Poppins", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --window-width: 800px;
  --window-height: 550px;
  --radius: 8px;
  --shadow: 0 10px 30px rgba(20, 40, 90, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
  --transition: 0.25s ease;
}

/* Dark theme: follows the system setting unless the user picked light */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --color-bg: #15161b;
    --color-surface: #1f2027;
    --color-ink: #f2f2f5;
    --color-text: #c4c6cf;
    --color-muted: #8b8e99;
    --color-header: #2c2d34;
    --color-border: #34363f;
    --color-hover: #272b36;
    --color-blue: #6e9cff;
    --color-error: #ff7b6b;
    --color-sky-soft: #1c2848;
    --color-sky: #1f3a78;
    --color-sky-deep: #2350b8;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.3);
  }
}

/* Dark theme chosen manually with the toggle */
:root[data-theme="dark"] {
  color-scheme: dark;

  --color-bg: #15161b;
  --color-surface: #1f2027;
  --color-ink: #f2f2f5;
  --color-text: #c4c6cf;
  --color-muted: #8b8e99;
  --color-header: #2c2d34;
  --color-border: #34363f;
  --color-hover: #272b36;
  --color-blue: #6e9cff;
  --color-error: #ff7b6b;
  --color-sky-soft: #1c2848;
  --color-sky: #1f3a78;
  --color-sky-deep: #2350b8;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.3);
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  /* Plain top half, soft blue gradient bottom half */
  background-color: var(--color-bg);
  background-image:
    linear-gradient(
      to bottom,
      var(--color-bg) 0%,
      var(--color-bg) 48%,
      var(--color-sky-soft) 58%,
      var(--color-sky) 78%,
      var(--color-sky-deep) 100%
    );
  background-attachment: fixed;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

/* ==========================================================
   Layout
   ========================================================== */
.page {
  min-height: 100vh;
  /* dvh excludes the mobile browser's address bar */
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px 20px;
}

/* ==========================================================
   Window
   ========================================================== */
.window {
  width: 100%;
  max-width: var(--window-width);
  min-height: var(--window-height);
  /* Auto margins keep the window centered while pushing the footer to the bottom */
  margin-block: auto;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: background-color var(--transition), border-color var(--transition);
}

.window__header {
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px 0 16px;
  background: var(--color-header);
  border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;
}

.window__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.2px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  font-size: 1rem;
  color: var(--color-white);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition);
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  transform: scale(1.08);
}

.theme-toggle:focus-visible {
  outline: 2px dashed var(--color-white);
  outline-offset: 2px;
}

.window__body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ==========================================================
   Views
   ========================================================== */
.view {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 18px 24px 44px;
}

.view.is-active {
  animation: fade-in 0.25s ease;
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* downloads / back link under the header */
.toolbar-link {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  color: var(--color-ink);
  transition: color var(--transition);
}

.toolbar-link i {
  font-size: 1.1rem;
}

.toolbar-link:hover,
.toolbar-link:focus-visible {
  color: var(--color-blue);
}

/* ==========================================================
   Hero
   ========================================================== */
.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 20px;
}

.hero__greeting {
  margin: 0;
  font-size: 48px;
  font-weight: 500;
  line-height: 1.15;
  color: var(--color-ink);
}

.hero__name {
  font-weight: 700;
  color: var(--color-blue);
}

/* Ghost copy reserves the full text size so typing never shifts the layout */
.hero__greeting {
  display: grid;
}

.hero__ghost,
.hero__typed {
  grid-area: 1 / 1;
}

.hero__ghost {
  visibility: hidden;
}

.hero__caret {
  display: inline-block;
  width: 3px;
  height: 0.9em;
  margin-left: 4px;
  vertical-align: -0.08em;
  background: var(--color-blue);
  animation: caret-blink 1s steps(1) infinite;
}

@keyframes caret-blink {
  50% { opacity: 0; }
}

.hero__subtitle {
  margin: 12px 0 0;
  font-size: 16px;
  color: var(--color-text);
}

/* ==========================================================
   Navigation menu
   ========================================================== */
.menu {
  display: flex;
  justify-content: center;
  gap: 56px;
  margin-top: 48px;
}

.menu__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 80px;
  cursor: pointer;
  transition: transform var(--transition);
}

.menu__icon {
  font-size: 60px;
  line-height: 1;
  color: var(--color-ink);
  transition: color var(--transition);
}

.menu__label {
  margin-top: 12px;
  font-size: 17px;
  color: var(--color-text);
  transition: color var(--transition);
}

.menu__item:hover,
.menu__item:focus-visible {
  transform: scale(1.06);
}

.menu__item:hover .menu__icon,
.menu__item:hover .menu__label,
.menu__item:focus-visible .menu__icon,
.menu__item:focus-visible .menu__label {
  color: var(--color-blue);
}

.menu__item:focus-visible,
.toolbar-link:focus-visible,
.file-list__item:focus-visible,
.folder-grid__item:focus-visible {
  outline: 2px dashed var(--color-blue);
  outline-offset: 6px;
}

/* ==========================================================
   Placeholder panels
   ========================================================== */
.accent {
  color: var(--color-blue);
}

.panel {
  width: 100%;
  max-width: 520px;
  margin: 28px auto 0;
}

.panel__title {
  margin: 0 0 20px;
  font-size: 34px;
  font-weight: 700;
  color: var(--color-ink);
  text-align: center;
}

.panel__text {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.7;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.file-list__item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--color-ink);
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.file-list__item i {
  width: 24px;
  font-size: 22px;
  text-align: center;
}

.file-list__item:hover {
  background: var(--color-hover);
  border-color: var(--color-border);
  color: var(--color-blue);
}

.folder-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
}

.folder-grid__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 110px;
  text-align: center;
  font-size: 15px;
  color: var(--color-text);
  transition: transform var(--transition), color var(--transition);
}

.folder-grid__item i {
  font-size: 56px;
  color: var(--color-ink);
  transition: color var(--transition);
}

.folder-grid__item:hover {
  transform: scale(1.06);
  color: var(--color-blue);
}

.folder-grid__item:hover i {
  color: var(--color-blue);
}

/* ==========================================================
   Contact
   ========================================================== */
.contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
}

.contact .panel__title {
  margin-bottom: 0;
}

.contact__text {
  max-width: 440px;
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
}

.contact__photo {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--color-surface);
  box-shadow: var(--shadow);
}

.contact__email {
  font-weight: 600;
  color: var(--color-blue);
  word-break: break-all;
}

.contact__email:hover,
.contact__email:focus-visible {
  text-decoration: underline;
}

.contact__button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
  padding: 12px 32px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
  background: var(--color-header);
  border-radius: 6px;
  transition: background-color var(--transition), transform var(--transition);
}

.contact__button:hover,
.contact__button:focus-visible {
  background: var(--color-blue);
  transform: scale(1.04);
}

.contact__button:focus-visible {
  outline: 2px dashed var(--color-blue);
  outline-offset: 4px;
}

/* ==========================================================
   Footer (sits on the blue background below the window)
   ========================================================== */
.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  color: var(--color-white);
}

.socials {
  display: flex;
  justify-content: center;
  gap: 18px;
}

.socials__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  font-size: 20px;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.socials__link:hover,
.socials__link:focus-visible {
  background: var(--color-white);
  color: var(--color-blue);
  transform: scale(1.08);
}

.socials__link:focus-visible {
  outline: 2px dashed var(--color-white);
  outline-offset: 4px;
}

.site-footer__copyright {
  margin: 0;
  font-size: 14px;
  opacity: 0.9;
}

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

/* Tablet */
@media (max-width: 860px) {
  .menu {
    gap: 32px;
  }

  .hero__greeting {
    font-size: 42px;
  }
}

/* Small tablet / large phone */
@media (max-width: 640px) {
  .page {
    padding: 14px;
  }

  /* Window hugs its content and stays centered in the space above the footer */
  .window {
    min-height: 0;
  }

  .site-footer {
    margin-top: 20px;
  }

  .view {
    padding: 16px 16px 36px;
  }

  .hero {
    flex: 0 0 auto;
    padding-top: 40px;
  }

  .hero__greeting {
    font-size: 34px;
  }

  .hero__subtitle {
    font-size: 15px;
  }

  /* 3 items per row; the shorter last row stays centered */
  .menu {
    flex-wrap: wrap;
    gap: 24px 12px;
    margin-top: 44px;
  }

  .menu__item {
    width: calc((100% - 24px) / 3);
  }

  .menu__icon {
    font-size: 52px;
  }

  .panel__title {
    font-size: 28px;
  }

  .folder-grid {
    gap: 24px;
  }
}

/* Small phone */
@media (max-width: 380px) {
  .page {
    padding: 10px;
  }

  .hero__greeting {
    font-size: 30px;
  }

  .menu__item {
    width: calc((100% - 12px) / 2);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}