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

/* theme vars */

/* default light */
:root,
[data-theme="light"] {
  --bg:           #f5f4f0;
  --card:         #ffffff;
  --border:       rgba(0, 0, 0, 0.08);
  --text:         #1a1a1a;
  --muted:        #888888;
  --accent:       #5a7af0;
  --accent-dim:   rgba(90, 122, 240, 0.08);
  --link-bg:      rgba(0, 0, 0, 0.03);
  --icon-bg:      rgba(0, 0, 0, 0.05);
  --avatar-ring:  #f5f4f0;
  --footer-color: rgba(0, 0, 0, 0.2);
  --toggle-bg:    #e8e7e3;
  --toggle-knob:  #ffffff;
  --shadow:       0 8px 40px rgba(0, 0, 0, 0.08);
}

/* dark */
[data-theme="dark"] {
  --bg:           #0e0e0f;
  --card:         #161618;
  --border:       rgba(255, 255, 255, 0.07);
  --text:         #e8e8e8;
  --muted:        #888888;
  --accent:       #c8f55a;
  --accent-dim:   rgba(200, 245, 90, 0.10);
  --link-bg:      rgba(255, 255, 255, 0.03);
  --icon-bg:      rgba(255, 255, 255, 0.05);
  --avatar-ring:  #0e0e0f;
  --footer-color: rgba(255, 255, 255, 0.18);
  --toggle-bg:    #2a2a2e;
  --toggle-knob:  #e8e8e8;
  --shadow:       0 8px 40px rgba(0, 0, 0, 0.4);
}

/* theme transitions */
html {
  transition: background 0.35s ease;
}

body,
.card,
.link-box,
.toggle-btn,
.avatar-placeholder,
.link-icon,
.name,
.handle,
.bio,
.divider,
.footer,
.link-title {
  transition:
    background  0.35s ease,
    border-color 0.35s ease,
    color        0.35s ease,
    box-shadow   0.35s ease;
}

/* body */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  /* Subtle noise texture */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}

/* toggle theme button */
.toggle-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 52px;
  height: 28px;
  border-radius: 100px;
  background: var(--toggle-bg);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 3px;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.toggle-knob {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--toggle-knob);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
  /* Slide animation */
  transform: translateX(0);
  transition:
    transform  0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
    background 0.35s ease;
}

[data-theme="dark"] .toggle-knob {
  transform: translateX(24px);
}

/* main box */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 28px;
  width: 100%;
  max-width: 480px;
  padding: 48px 36px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow);
  animation: fadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* profile */
.avatar-wrap {
  position: relative;
  margin-bottom: 24px;
}

/* spinning thingy */
.avatar-wrap::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: conic-gradient(var(--accent) 0%, transparent 60%, var(--accent) 100%);
  animation: spin 6s linear infinite;
  opacity: 0.7;
  transition: opacity 0.35s ease;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  position: relative;
  border: 3px solid var(--avatar-ring);
}

/* emoji fallback :cry: */
.avatar-placeholder {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 3px solid var(--avatar-ring);
  background: var(--icon-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  font-size: 36px;
}

/* header */
.name {
  font-family: 'DM Serif Display', serif;
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.3px;
  color: var(--text);
  margin-bottom: 8px;
  text-align: center;
}

.handle {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.4px;
  margin-bottom: 14px;
}

.bio {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
  text-align: center;
  max-width: 340px;
  margin-bottom: 36px;
}

/* dividers */
.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: 28px;
}

/* links boxes */
.links {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.link-box {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--link-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px 20px;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  animation: fadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
  transition:
    background    0.35s ease,
    border-color  0.2s,
    transform     0.2s,
    box-shadow    0.2s;
}

.link-box:nth-child(1) { animation-delay: 0.10s; }
.link-box:nth-child(2) { animation-delay: 0.18s; }
.link-box:nth-child(3) { animation-delay: 0.26s; }

/* Accent overlay on hover */
.link-box::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-dim);
  opacity: 0;
  transition: opacity 0.2s;
  border-radius: inherit;
}

.link-box:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.link-box:hover::after {
  opacity: 1;
}

.link-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--icon-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
  position: relative;
  z-index: 1;
}

.link-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.link-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 2px;
}

.link-desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.link-arrow {
  color: var(--muted);
  font-size: 16px;
  position: relative;
  z-index: 1;
  transition: color 0.2s, transform 0.2s;
}

.link-box:hover .link-arrow {
  color: var(--accent);
  transform: translateX(3px);
}

/* foot */
.footer {
  margin-top: 32px;
  font-size: 12px;
  color: var(--footer-color);
  letter-spacing: 0.3px;
}

/* file browser */

/* Overlay backdrop */
.browser-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.browser-overlay.open {
  opacity: 1;
  pointer-events: all;
}

/* Modal panel */
.browser-modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  width: 100%;
  max-width: 520px;
  max-height: 75vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow);
  transform: translateY(16px) scale(0.98);
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.browser-overlay.open .browser-modal {
  transform: translateY(0) scale(1);
}

/* Modal header bar */
.browser-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

/* Back button */
.browser-back {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px 4px 4px;
  border-radius: 8px;
  flex-shrink: 0;
  transition: background 0.15s;
}

.browser-back:hover {
  background: var(--accent-dim);
}

/* Breadcrumb trail */
.browser-breadcrumb {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  font-size: 13px;
  min-width: 0;
}

.crumb-link {
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s;
}

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

.crumb-sep {
  color: var(--border);
  user-select: none;
}

.crumb-current {
  color: var(--text);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Close button */
.browser-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}

.browser-close:hover {
  background: var(--accent-dim);
  color: var(--text);
}

/* Scrollable file/folder list */
.browser-list {
  overflow-y: auto;
  flex: 1;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Scrollbar styling */
.browser-list::-webkit-scrollbar {
  width: 4px;
}
.browser-list::-webkit-scrollbar-track {
  background: transparent;
}
.browser-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

/* Individual row */
.browser-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-radius: 12px;
  cursor: pointer;
  border: 1px solid transparent;
  animation: fadeUp 0.3s cubic-bezier(0.22, 1, 0.36, 1) both;
  transition: background 0.15s, border-color 0.15s;
}

.browser-item:hover {
  background: var(--link-bg);
  border-color: var(--border);
}

/* Icon bubble */
.browser-item-icon {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.folder-icon {
  background: var(--accent-dim);
  color: var(--accent);
}

.file-icon {
  background: var(--icon-bg);
  color: var(--muted);
}

.browser-item:hover .file-icon {
  color: var(--accent);
}

/* Item name */
.browser-item-name {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Item meta (item count / PDF label) */
.browser-item-meta {
  font-size: 12px;
  color: var(--muted);
  flex-shrink: 0;
}

/* Row arrow */
.browser-item-arrow {
  font-size: 15px;
  color: var(--muted);
  flex-shrink: 0;
  transition: color 0.15s, transform 0.15s;
}

.browser-item:hover .browser-item-arrow {
  color: var(--accent);
  transform: translateX(2px);
}

/* Empty state */
.browser-empty {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding: 40px 20px;
}

/* Handle theme transition for modal elements */
.browser-modal,
.browser-header,
.browser-back,
.browser-close,
.browser-item {
  transition:
    background  0.35s ease,
    border-color 0.35s ease,
    color        0.35s ease,
    box-shadow   0.35s ease;
}