/* ─── Font Face ─────────────────────────────── */
    @font-face {
      font-family: "AppFont";
      src: url("Font.woff2") format("woff2");
      font-weight: 400;
      font-style: normal;
      font-display: swap;
    }
    @font-face {
      font-family: "AppFont";
      src: url("Font.woff2") format("woff2");
      font-weight: 700;
      font-style: normal;
      font-display: swap;
    }

    /* ─── Design Tokens ────────────────────────────────── */
    :root {
      --bg:          #f5f5f5;
      --surface:     #ffffff;
      --surface-70:  #ffffffb3;
      --surface-2:   #ececec;
      --surface-2-70:#ecececb3;
      --border:      #d4d4d4;
      --text:        #1a1a1a;
      --text-muted:  #6b6b6b;
      --accent:      #2d2d2d;
      --accent-hover:#000000;
      --done-bg:     #e8e8e8;
      --done-text:   #9a9a9a;
      --shadow:      0 2px 12px rgba(0,0,0,.10);
      --shadow-lg:   0 8px 32px rgba(0,0,0,.15);
      --radius:      14px;
      --radius-sm:   8px;
      --transition:  .2s ease;
    }
    @media (prefers-color-scheme: dark) {
      :root {
        --bg:          #111111;
        --surface:     #1e1e1e;
        --surface-70:  #1e1e1eb3;
        --surface-2:   #2a2a2a;
        --surface-2-70:#2a2a2ab3;
        --border:      #3a3a3a;
        --text:        #f0f0f0;
        --text-muted:  #888888;
        --accent:      #e0e0e0;
        --accent-hover:#ffffff;
        --done-bg:     #252525;
        --done-text:   #555555;
        --shadow:      0 2px 12px rgba(0,0,0,.40);
        --shadow-lg:   0 8px 32px rgba(0,0,0,.60);
      }
    }

    /* ─── Reset & Base ─────────────────────────────────── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { font-size: 16px; }
    body {
      font-family: "AppFont", system-ui, sans-serif;
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      transition: background var(--transition), color var(--transition);
    }
    .btn,
    button, 
    input, 
    optgroup, 
    select, 
    textarea {
      font-family: "AppFont", system-ui, sans-serif;
      font-size: inherit;
      line-height: inherit;
      color: inherit;
    }

    /* ─── Header ───────────────────────────────────────── */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--surface-70);
      backdrop-filter: blur(5px);
      border-bottom: 1px solid var(--border);
      box-shadow: var(--shadow);
      padding: 0 1.5rem;
    }
    .header-inner {
      max-width: 1200px;
      margin: 0 auto;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: .6rem;
      font-weight: 700;
      font-size: 1.2rem;
      color: var(--text);
    }
    .logo svg, .logo img { flex-shrink: 0; }
    .logo img {
        filter: grayscale(1);
    }
    @media (prefers-color-scheme: dark) {
        .logo img {
            filter: grayscale(1) invert(1);
        }
    }

    /* search */
    .search-wrap {
      flex: 1;
      max-width: 360px;
      position: relative;
    }
    .search-wrap svg {
      position: absolute;
      right: .75rem;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      pointer-events: none;
    }
    .search-wrap input {
      width: 100%;
      padding: .55rem 2.4rem .55rem .9rem;
      border: 1px solid var(--border);
      border-radius: 50px;
      background: var(--surface-2-70);
      color: var(--text);
      font-size: .9rem;
      outline: none;
      transition: border-color var(--transition), box-shadow var(--transition);
    }
    .search-wrap input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(128,128,128,.15);
    }

    /* add button */
    .btn-add {
      display: flex;
      align-items: center;
      gap: .45rem;
      padding: .55rem 1.1rem;
      background: var(--accent);
      color: var(--bg);
      border: none;
      border-radius: 50px;
      font-size: .9rem;
      font-weight: 700;
      cursor: pointer;
      transition: background var(--transition), transform var(--transition);
      white-space: nowrap;
    }
    .btn-add:hover { background: var(--accent-hover); }
    .btn-add:active { transform: translateY(0); }

    /* ─── Filter Bar ───────────────────────────────────── */
    .filter-bar {
      max-width: 1200px;
      margin: 1.5rem auto .5rem;
      padding: 0 1.5rem;
      display: flex;
      align-items: center;
      gap: .6rem;
      flex-wrap: wrap;
    }
    .filter-btn {
      padding: .4rem .9rem;
      border: 1px solid var(--border);
      border-radius: 50px;
      background: var(--surface);
      color: var(--text-muted);
      font-size: .82rem;
      cursor: pointer;
      transition: all var(--transition);
    }
    .filter-btn.active {
      background: var(--accent);
      color: var(--bg);
      border-color: var(--accent);
    }
    .filter-btn:hover:not(.active) {
      border-color: var(--accent);
      color: var(--text);
    }
    .note-count {
      margin-right: auto;
      font-size: .82rem;
      color: var(--text-muted);
    }

    /* ─── Grid ─────────────────────────────────────────── */
    .grid {
      max-width: 1200px;
      margin: 0 auto;
      padding: 1rem 1.5rem 4rem;
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 1.1rem;
    }

    /* ─── Note Card ────────────────────────────────────── */
    .note-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 1.1rem 1.1rem .85rem;
      display: flex;
      flex-direction: column;
      gap: .7rem;
      transition: box-shadow var(--transition), transform var(--transition), opacity var(--transition);
      animation: fadeIn .25s ease;
    }
    .note-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
    .note-card.done {
      background: var(--done-bg);
      opacity: .75;
    }
    .note-card.done .note-title,
    .note-card.done .note-body {
      color: var(--done-text);
      text-decoration: line-through;
    }
    
    .note-card .note-image {
      width: 100%;
      max-height: 150px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      margin-bottom: 0.5rem;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(8px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    .note-title {
      font-weight: 700;
      font-size: 1rem;
      line-height: 1.4;
      word-break: break-word;
    }
    .note-body {
      font-size: .88rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
      word-break: break-word;
      white-space: pre-wrap;
      max-height: 120px;
      overflow: hidden;
      display: -webkit-box;
      -webkit-line-clamp: 5;
      -webkit-box-orient: vertical;
    }
    .note-date {
      font-size: .75rem;
      color: var(--text-muted);
      opacity: .7;
    }

    /* card actions */
    .note-actions {
      display: flex;
      align-items: center;
      gap: .35rem;
      border-top: 1px solid var(--border);
      padding-top: .7rem;
    }
    .icon-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 34px;
      height: 34px;
      border: none;
      border-radius: var(--radius-sm);
      background: transparent;
      color: var(--text-muted);
      cursor: pointer;
      transition: background var(--transition), color var(--transition);
    }
    .icon-btn:hover { background: var(--surface-2); color: var(--text); }
    .icon-btn.done-btn.active { color: #4caf50; }
    .icon-btn.delete-btn:hover { background: #fee2e2; color: #dc2626; }
    @media (prefers-color-scheme: dark) {
      .icon-btn.delete-btn:hover { background: #3b1515; color: #f87171; }
    }
    .spacer { flex: 1; }

    /* ─── Empty State ──────────────────────────────────── */
    .empty-state {
      grid-column: 1 / -1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 1rem;
      padding: 5rem 1rem;
      color: var(--text-muted);
      text-align: center;
    }
    .empty-state svg { opacity: .35; }
    .empty-state p { font-size: .95rem; }

    /* ─── Modal ────────────────────────────────────────── */
    .modal-overlay {
      position: fixed;
      inset: 0;
      max-width: 100vw;
      max-height: 100vh;
      background: rgba(0,0,0,.45);
      backdrop-filter: blur(4px);
      z-index: 200;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1rem;
      opacity: 0;
      pointer-events: none;
      transition: opacity var(--transition);
      overflow: auto;
    }
    .modal-overlay.open { opacity: 1; pointer-events: all; }
    .modal {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      width: 100%;
      max-width: 480px;
      display: flex;
      flex-direction: column;
      gap: 1rem;
      transform: scale(.95) translateY(10px);
      transition: transform var(--transition);
      max-height: 90vh;
      overflow-y: auto;
    }
    .modal>div {
      padding: 0 1.6rem;
    }
    .modal-overlay.open .modal { transform: scale(1) translateY(0); }
    .modal-header {
      display: flex;
      position: sticky;
      top:0;
      background-color: var(--surface-70);
      backdrop-filter: blur(5px);
      align-items: center;
      justify-content: space-between;
      padding: 1.6rem !important;
    }
    .modal-header h2 { font-size: 1.1rem; font-weight: 700; }
    .modal label {
      font-size: .85rem;
      color: var(--text-muted);
      display: block;
      margin-bottom: .35rem;
    }
    .modal input[type="text"],
    .modal textarea {
      width: 100%;
      padding: .65rem .85rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background: var(--surface-2);
      color: var(--text);
      font-size: .92rem;
      outline: none;
      transition: border-color var(--transition), box-shadow var(--transition);
      resize: vertical;
    }
    .modal input[type="text"]:focus,
    .modal textarea:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(128,128,128,.15);
    }
    .modal textarea { min-height: 120px; }
    .modal-footer {
      display: flex;
      gap: .6rem;
      justify-content: flex-end;
      padding: 1.6rem !important;
    }
    .btn {
      padding: .55rem 1.2rem;
      border-radius: var(--radius-sm);
      font-size: .9rem;
      font-weight: 700;
      cursor: pointer;
      border: 1px solid var(--border);
      transition: all var(--transition);
    }
    .btn-ghost { background: transparent; color: var(--text-muted); }
    .btn-ghost:hover { background: var(--surface-2); color: var(--text); }
    .btn-primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
    .btn-primary:hover { background: var(--accent-hover); }

    /* ─── Confirm Dialog ───────────────────────────────── */
    .confirm-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,.5);
      backdrop-filter: blur(4px);
      z-index: 300;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1rem;
      opacity: 0;
      pointer-events: none;
      transition: opacity var(--transition);
    }
    .confirm-overlay.open { opacity: 1; pointer-events: all; }
    .confirm-box {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      padding: 1.6rem;
      max-width: 340px;
      width: 100%;
      display: flex;
      flex-direction: column;
      gap: 1rem;
      transform: scale(.95);
      transition: transform var(--transition);
    }
    .confirm-overlay.open .confirm-box { transform: scale(1); }
    .confirm-box h3 { font-size: 1rem; font-weight: 700; }
    .confirm-box p { font-size: .88rem; color: var(--text-muted); }
    .confirm-footer { display: flex; gap: .6rem; justify-content: flex-end; }
    .btn-danger { background: #dc2626; color: #fff; border-color: #dc2626; }
    .btn-danger:hover { background: #b91c1c; }

    /* ─── Toast ────────────────────────────────────────── */
    .toast-container {
      position: fixed;
      bottom: 1.5rem;
      left: 50%;
      transform: translateX(-50%);
      z-index: 400;
      display: flex;
      flex-direction: column;
      gap: .5rem;
      align-items: center;
    }
    .toast {
      background: var(--accent);
      color: var(--bg);
      padding: .6rem 1.2rem;
      border-radius: 50px;
      font-size: .85rem;
      font-weight: 700;
      text-align: center;
      box-shadow: var(--shadow-lg);
      animation: toastIn .25s ease, toastOut .3s ease 3.5s forwards;
      white-space: nowrap;
    }
    .toast.only-in {
      animation: toastIn .25s ease forwards;
    }
    @keyframes toastIn  { from { opacity:0; transform:translateY(12px); } to { opacity:1; transform:translateY(0); } }
    @keyframes toastOut { from { opacity:1; } to { opacity:0; transform:translateY(8px); } }

    /* ─── Responsive ───────────────────────────────────── */
    @media (max-width: 600px) {
      .header-inner { height: 56px; }
      .search-wrap { max-width: 180px; }
      .btn-add span { display: none; }
      .grid { grid-template-columns: 1fr 1fr; gap: .75rem; padding: .75rem .75rem 4rem; }
    }
    @media (max-width: 400px) {
      .grid { grid-template-columns: 1fr; }
    }