feat: US-005 - Set up Tailwind CSS and design tokens from Vercel/warm gold palette

- Install tailwindcss and @tailwindcss/vite plugin
- Configure Tailwind v4 with @theme directive in style.css
- Add custom color tokens: gold, gold-deep, gold-light, gold-pale
- Add warm palette: page-bg, shell-bg, panel-bg, text-main, text-soft, text-muted
- Add card colors cycling through rose, amber, mint, sky, violet, peach
- Set Inter as primary font family
- Vite build verified: Tailwind CSS generates 6.15kB output

frontend/package-lock.json

@@ -14,9 +14,11 @@
         "vue-router": "^4.6.4"
       },
       "devDependencies": {
+        "@tailwindcss/vite": "^4.2.2",
         "@types/node": "^24.12.2",
         "@vitejs/plugin-vue": "^6.0.5",
         "@vue/tsconfig": "^0.9.1",
+        "tailwindcss": "^4.2.2",
         "typescript": "~6.0.2",
         "vite": "^8.0.4",
         "vue-tsc": "^3.2.7"
@@ -102,12 +104,55 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@jridgewell/gen-mapping": {
+      "version": "0.3.13",
+      "resolved": "https://registry.npmmirror.com/@jridgewell/gen-mapping/-/gen-mapping-0.3.13.tgz",
+      "integrity": "sha512-2kkt/7niJ6MgEPxF0bYdQ6etZaA+fQvDcLKckhy1yIQOzaoKjBBjSj63/aLVjYE3qhRt5dvM+uUyfCg6UKCBbA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/sourcemap-codec": "^1.5.0",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      }
+    },
+    "node_modules/@jridgewell/remapping": {
+      "version": "2.3.5",
+      "resolved": "https://registry.npmmirror.com/@jridgewell/remapping/-/remapping-2.3.5.tgz",
+      "integrity": "sha512-LI9u/+laYG4Ds1TDKSJW2YPrIlcVYOwi2fUC6xB43lueCjgxV4lffOCZCtYFiH6TNOX+tQKXx97T4IKHbhyHEQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/gen-mapping": "^0.3.5",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      }
+    },
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmmirror.com/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
+      "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/@jridgewell/sourcemap-codec": {
       "version": "1.5.5",
       "resolved": "https://registry.npmmirror.com/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
       "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
       "license": "MIT"
     },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.31",
+      "resolved": "https://registry.npmmirror.com/@jridgewell/trace-mapping/-/trace-mapping-0.3.31.tgz",
+      "integrity": "sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.1.0",
+        "@jridgewell/sourcemap-codec": "^1.4.14"
+      }
+    },
     "node_modules/@napi-rs/wasm-runtime": {
       "version": "1.1.4",
       "resolved": "https://registry.npmmirror.com/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.4.tgz",
@@ -401,6 +446,278 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@tailwindcss/node": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/node/-/node-4.2.2.tgz",
+      "integrity": "sha512-pXS+wJ2gZpVXqFaUEjojq7jzMpTGf8rU6ipJz5ovJV6PUGmlJ+jvIwGrzdHdQ80Sg+wmQxUFuoW1UAAwHNEdFA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/remapping": "^2.3.5",
+        "enhanced-resolve": "^5.19.0",
+        "jiti": "^2.6.1",
+        "lightningcss": "1.32.0",
+        "magic-string": "^0.30.21",
+        "source-map-js": "^1.2.1",
+        "tailwindcss": "4.2.2"
+      }
+    },
+    "node_modules/@tailwindcss/oxide": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide/-/oxide-4.2.2.tgz",
+      "integrity": "sha512-qEUA07+E5kehxYp9BVMpq9E8vnJuBHfJEC0vPC5e7iL/hw7HR61aDKoVoKzrG+QKp56vhNZe4qwkRmMC0zDLvg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">= 20"
+      },
+      "optionalDependencies": {
+        "@tailwindcss/oxide-android-arm64": "4.2.2",
+        "@tailwindcss/oxide-darwin-arm64": "4.2.2",
+        "@tailwindcss/oxide-darwin-x64": "4.2.2",
+        "@tailwindcss/oxide-freebsd-x64": "4.2.2",
+        "@tailwindcss/oxide-linux-arm-gnueabihf": "4.2.2",
+        "@tailwindcss/oxide-linux-arm64-gnu": "4.2.2",
+        "@tailwindcss/oxide-linux-arm64-musl": "4.2.2",
+        "@tailwindcss/oxide-linux-x64-gnu": "4.2.2",
+        "@tailwindcss/oxide-linux-x64-musl": "4.2.2",
+        "@tailwindcss/oxide-wasm32-wasi": "4.2.2",
+        "@tailwindcss/oxide-win32-arm64-msvc": "4.2.2",
+        "@tailwindcss/oxide-win32-x64-msvc": "4.2.2"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-android-arm64": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-android-arm64/-/oxide-android-arm64-4.2.2.tgz",
+      "integrity": "sha512-dXGR1n+P3B6748jZO/SvHZq7qBOqqzQ+yFrXpoOWWALWndF9MoSKAT3Q0fYgAzYzGhxNYOoysRvYlpixRBBoDg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-darwin-arm64": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-darwin-arm64/-/oxide-darwin-arm64-4.2.2.tgz",
+      "integrity": "sha512-iq9Qjr6knfMpZHj55/37ouZeykwbDqF21gPFtfnhCCKGDcPI/21FKC9XdMO/XyBM7qKORx6UIhGgg6jLl7BZlg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-darwin-x64": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-darwin-x64/-/oxide-darwin-x64-4.2.2.tgz",
+      "integrity": "sha512-BlR+2c3nzc8f2G639LpL89YY4bdcIdUmiOOkv2GQv4/4M0vJlpXEa0JXNHhCHU7VWOKWT/CjqHdTP8aUuDJkuw==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-freebsd-x64": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-freebsd-x64/-/oxide-freebsd-x64-4.2.2.tgz",
+      "integrity": "sha512-YUqUgrGMSu2CDO82hzlQ5qSb5xmx3RUrke/QgnoEx7KvmRJHQuZHZmZTLSuuHwFf0DJPybFMXMYf+WJdxHy/nQ==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-linux-arm-gnueabihf": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-linux-arm-gnueabihf/-/oxide-linux-arm-gnueabihf-4.2.2.tgz",
+      "integrity": "sha512-FPdhvsW6g06T9BWT0qTwiVZYE2WIFo2dY5aCSpjG/S/u1tby+wXoslXS0kl3/KXnULlLr1E3NPRRw0g7t2kgaQ==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-linux-arm64-gnu": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-linux-arm64-gnu/-/oxide-linux-arm64-gnu-4.2.2.tgz",
+      "integrity": "sha512-4og1V+ftEPXGttOO7eCmW7VICmzzJWgMx+QXAJRAhjrSjumCwWqMfkDrNu1LXEQzNAwz28NCUpucgQPrR4S2yw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-linux-arm64-musl": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-linux-arm64-musl/-/oxide-linux-arm64-musl-4.2.2.tgz",
+      "integrity": "sha512-oCfG/mS+/+XRlwNjnsNLVwnMWYH7tn/kYPsNPh+JSOMlnt93mYNCKHYzylRhI51X+TbR+ufNhhKKzm6QkqX8ag==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-linux-x64-gnu": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-linux-x64-gnu/-/oxide-linux-x64-gnu-4.2.2.tgz",
+      "integrity": "sha512-rTAGAkDgqbXHNp/xW0iugLVmX62wOp2PoE39BTCGKjv3Iocf6AFbRP/wZT/kuCxC9QBh9Pu8XPkv/zCZB2mcMg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-linux-x64-musl": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-linux-x64-musl/-/oxide-linux-x64-musl-4.2.2.tgz",
+      "integrity": "sha512-XW3t3qwbIwiSyRCggeO2zxe3KWaEbM0/kW9e8+0XpBgyKU4ATYzcVSMKteZJ1iukJ3HgHBjbg9P5YPRCVUxlnQ==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-wasm32-wasi/-/oxide-wasm32-wasi-4.2.2.tgz",
+      "integrity": "sha512-eKSztKsmEsn1O5lJ4ZAfyn41NfG7vzCg496YiGtMDV86jz1q/irhms5O0VrY6ZwTUkFy/EKG3RfWgxSI3VbZ8Q==",
+      "bundleDependencies": [
+        "@napi-rs/wasm-runtime",
+        "@emnapi/core",
+        "@emnapi/runtime",
+        "@tybys/wasm-util",
+        "@emnapi/wasi-threads",
+        "tslib"
+      ],
+      "cpu": [
+        "wasm32"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/core": "^1.8.1",
+        "@emnapi/runtime": "^1.8.1",
+        "@emnapi/wasi-threads": "^1.1.0",
+        "@napi-rs/wasm-runtime": "^1.1.1",
+        "@tybys/wasm-util": "^0.10.1",
+        "tslib": "^2.8.1"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-win32-arm64-msvc": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-win32-arm64-msvc/-/oxide-win32-arm64-msvc-4.2.2.tgz",
+      "integrity": "sha512-qPmaQM4iKu5mxpsrWZMOZRgZv1tOZpUm+zdhhQP0VhJfyGGO3aUKdbh3gDZc/dPLQwW4eSqWGrrcWNBZWUWaXQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-win32-x64-msvc": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/oxide-win32-x64-msvc/-/oxide-win32-x64-msvc-4.2.2.tgz",
+      "integrity": "sha512-1T/37VvI7WyH66b+vqHj/cLwnCxt7Qt3WFu5Q8hk65aOvlwAhs7rAp1VkulBJw/N4tMirXjVnylTR72uI0HGcA==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@tailwindcss/vite": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/@tailwindcss/vite/-/vite-4.2.2.tgz",
+      "integrity": "sha512-mEiF5HO1QqCLXoNEfXVA1Tzo+cYsrqV7w9Juj2wdUFyW07JRenqMG225MvPwr3ZD9N1bFQj46X7r33iHxLUW0w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@tailwindcss/node": "4.2.2",
+        "@tailwindcss/oxide": "4.2.2",
+        "tailwindcss": "4.2.2"
+      },
+      "peerDependencies": {
+        "vite": "^5.2.0 || ^6 || ^7 || ^8"
+      }
+    },
     "node_modules/@tybys/wasm-util": {
       "version": "0.10.1",
       "resolved": "https://registry.npmmirror.com/@tybys/wasm-util/-/wasm-util-0.10.1.tgz",
@@ -748,6 +1065,20 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/enhanced-resolve": {
+      "version": "5.20.1",
+      "resolved": "https://registry.npmmirror.com/enhanced-resolve/-/enhanced-resolve-5.20.1.tgz",
+      "integrity": "sha512-Qohcme7V1inbAfvjItgw0EaxVX5q2rdVEZHRBrEQdRZTssLDGsL8Lwrznl8oQ/6kuTJONLaDcGjkNP247XEhcA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "graceful-fs": "^4.2.4",
+        "tapable": "^2.3.0"
+      },
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/entities": {
       "version": "7.0.1",
       "resolved": "https://registry.npmmirror.com/entities/-/entities-7.0.1.tgz",
@@ -938,6 +1269,13 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/graceful-fs": {
+      "version": "4.2.11",
+      "resolved": "https://registry.npmmirror.com/graceful-fs/-/graceful-fs-4.2.11.tgz",
+      "integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmmirror.com/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -995,6 +1333,16 @@
         "url": "https://github.com/sponsors/mesqueeb"
       }
     },
+    "node_modules/jiti": {
+      "version": "2.6.1",
+      "resolved": "https://registry.npmmirror.com/jiti/-/jiti-2.6.1.tgz",
+      "integrity": "sha512-ekilCSN1jwRvIbgeg/57YFh8qQDNbwDb9xT/qu2DAHbFFZUicIl4ygVaAvzveMhMVr3LnpSKTNnwt8PoOfmKhQ==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "jiti": "lib/jiti-cli.mjs"
+      }
+    },
     "node_modules/lightningcss": {
       "version": "1.32.0",
       "resolved": "https://registry.npmmirror.com/lightningcss/-/lightningcss-1.32.0.tgz",
@@ -1493,6 +1841,27 @@
         "node": ">=16"
       }
     },
+    "node_modules/tailwindcss": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmmirror.com/tailwindcss/-/tailwindcss-4.2.2.tgz",
+      "integrity": "sha512-KWBIxs1Xb6NoLdMVqhbhgwZf2PGBpPEiwOqgI4pFIYbNTfBXiKYyWoTsXgBQ9WFg/OlhnvHaY+AEpW7wSmFo2Q==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/tapable": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmmirror.com/tapable/-/tapable-2.3.2.tgz",
+      "integrity": "sha512-1MOpMXuhGzGL5TTCZFItxCc0AARf1EZFQkGqMm7ERKj8+Hgr5oLvJOVFcC+lRmR8hCe2S3jC4T5D7Vg/d7/fhA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/webpack"
+      }
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.16",
       "resolved": "https://registry.npmmirror.com/tinyglobby/-/tinyglobby-0.2.16.tgz",

frontend/package.json

@@ -15,9 +15,11 @@
     "vue-router": "^4.6.4"
   },
   "devDependencies": {
+    "@tailwindcss/vite": "^4.2.2",
     "@types/node": "^24.12.2",
     "@vitejs/plugin-vue": "^6.0.5",
     "@vue/tsconfig": "^0.9.1",
+    "tailwindcss": "^4.2.2",
     "typescript": "~6.0.2",
     "vite": "^8.0.4",
     "vue-tsc": "^3.2.7"

frontend/src/style.css

@@ -1,9 +1,30 @@
+@import "tailwindcss";
+
+@theme {
+  --color-gold: #b57a27;
+  --color-gold-deep: #8d5b17;
+  --color-gold-light: #d4a04a;
+  --color-gold-pale: #fff7e8;
+
+  --color-page-bg: #fffaf1;
+  --color-shell-bg: rgba(255, 250, 241, 0.76);
+  --color-panel-bg: rgba(255, 253, 247, 0.88);
+
+  --color-text-main: #2f261d;
+  --color-text-soft: #706251;
+  --color-text-muted: #a89880;
+
+  --color-card-rose: #fce4ec;
+  --color-card-amber: #fff8e1;
+  --color-card-mint: #e0f2f1;
+  --color-card-sky: #e1f5fe;
+  --color-card-violet: #f3e5f5;
+  --color-card-peach: #fff3e0;
+
+  --font-family-sans: 'Inter', system-ui, -apple-system, sans-serif;
+}
+
 :root {
-  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
-  color: #2f261d;
-  background-color: #fff;
   font-synthesis: none;
   text-rendering: optimizeLegibility;
   -webkit-font-smoothing: antialiased;
@@ -12,4 +33,5 @@
 
 body {
   margin: 0;
+  font-family: var(--font-family-sans);
 }

frontend/vite.config.ts

@@ -1,9 +1,10 @@
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
+import tailwindcss from '@tailwindcss/vite'
 import { fileURLToPath, URL } from 'node:url'
 
 export default defineConfig({
-  plugins: [vue()],
+  plugins: [vue(), tailwindcss()],
   resolve: {
     alias: {
       '@': fileURLToPath(new URL('./src', import.meta.url)),