diff --git a/src/App.css b/src/App.css
index 036222b..f04a47c 100644
--- a/src/App.css
+++ b/src/App.css
@@ -44,6 +44,471 @@ h1, h2, h3, h4, h5, h6 {
   width: auto;
 }
 
+/* =========================================================
+   AUTH PAGES
+========================================================= */
+.auth-root,
+.signup-root {
+  position: relative;
+  min-height: 100vh;
+  overflow: hidden;
+  background:
+    radial-gradient(circle at 12% 18%, rgba(6, 182, 212, 0.2), transparent 28%),
+    radial-gradient(circle at 88% 14%, rgba(139, 92, 246, 0.2), transparent 34%),
+    linear-gradient(160deg, #050816 0%, #0b1120 48%, #111827 100%);
+  color: var(--text-main);
+}
+
+.bg-blobs,
+.signup-blobs {
+  position: absolute;
+  inset: 0;
+  pointer-events: none;
+  overflow: hidden;
+}
+
+.blob,
+.signup-blob {
+  position: absolute;
+  border-radius: 999px;
+  filter: blur(80px);
+  opacity: 0.5;
+}
+
+.blob-a,
+.signup-blob-a {
+  top: 10%;
+  left: -8%;
+  width: 320px;
+  height: 320px;
+  background: rgba(59, 130, 246, 0.28);
+}
+
+.blob-b,
+.signup-blob-b {
+  right: -10%;
+  top: 18%;
+  width: 360px;
+  height: 360px;
+  background: rgba(14, 165, 233, 0.16);
+}
+
+.blob-c,
+.signup-blob-c {
+  left: 38%;
+  bottom: -12%;
+  width: 420px;
+  height: 420px;
+  background: rgba(99, 102, 241, 0.18);
+}
+
+.auth-header,
+.signup-header,
+.auth-footer,
+.signup-footer {
+  position: relative;
+  z-index: 1;
+  width: min(1180px, calc(100% - 40px));
+  margin: 0 auto;
+}
+
+.auth-header,
+.signup-header {
+  padding: 28px 0 0;
+}
+
+.brand,
+.signup-brand {
+  display: inline-flex;
+  align-items: center;
+  gap: 14px;
+  padding: 12px 16px;
+  border: 1px solid rgba(148, 163, 184, 0.18);
+  border-radius: 18px;
+  background: rgba(15, 23, 42, 0.45);
+  backdrop-filter: blur(18px);
+  box-shadow: 0 18px 48px rgba(2, 6, 23, 0.24);
+}
+
+.brand-name,
+.signup-brand-name {
+  font-size: 1.15rem;
+  font-weight: 800;
+  letter-spacing: -0.03em;
+}
+
+.brand-sub,
+.signup-brand-sub {
+  color: #94a3b8;
+  font-size: 0.88rem;
+}
+
+.auth-main,
+.signup-main {
+  position: relative;
+  z-index: 1;
+  width: min(1180px, calc(100% - 40px));
+  margin: 0 auto;
+  padding: 44px 0 28px;
+  display: grid;
+  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
+  gap: 40px;
+  align-items: center;
+}
+
+.signup-main {
+  grid-template-columns: minmax(0, 1fr);
+  justify-items: center;
+  min-height: calc(100vh - 170px);
+}
+
+.hero-copy {
+  max-width: 620px;
+}
+
+.hero-title {
+  font-size: clamp(2.8rem, 5vw, 4.9rem);
+  line-height: 0.98;
+  letter-spacing: -0.05em;
+  margin-bottom: 18px;
+}
+
+.hero-title span {
+  background: linear-gradient(135deg, #67e8f9, #a78bfa);
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+}
+
+.hero-desc {
+  max-width: 560px;
+  color: #94a3b8;
+  font-size: 1.08rem;
+  line-height: 1.75;
+}
+
+.feature-row {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 14px;
+  margin-top: 32px;
+}
+
+.feat {
+  padding: 16px 18px;
+  border-radius: 18px;
+  border: 1px solid rgba(148, 163, 184, 0.16);
+  background: rgba(15, 23, 42, 0.5);
+  color: #cbd5e1;
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
+}
+
+.feat strong {
+  display: block;
+  color: #f8fafc;
+  font-size: 0.95rem;
+  margin-bottom: 4px;
+}
+
+.feat span {
+  font-size: 0.9rem;
+  color: #94a3b8;
+}
+
+.auth-panel-wrap,
+.signup-panel-wrap {
+  width: 100%;
+  display: flex;
+  justify-content: center;
+}
+
+.auth-panel,
+.signup-panel {
+  position: relative;
+  width: min(100%, 470px);
+  border-radius: 32px;
+  border: 1px solid rgba(148, 163, 184, 0.18);
+  background:
+    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
+    rgba(9, 14, 28, 0.82);
+  backdrop-filter: blur(24px);
+  box-shadow:
+    0 28px 80px rgba(2, 6, 23, 0.48),
+    inset 0 1px 0 rgba(255, 255, 255, 0.05);
+  overflow: hidden;
+}
+
+.panel-inner,
+.signup-panel-inner {
+  position: relative;
+  z-index: 1;
+  padding: 34px 30px 30px;
+}
+
+.auth-form,
+.signup-form {
+  display: flex;
+  flex-direction: column;
+  gap: 18px;
+}
+
+.form-title,
+.signup-form-title {
+  margin: 0 0 6px;
+  font-size: 1.9rem;
+  line-height: 1.15;
+  letter-spacing: -0.04em;
+}
+
+.field,
+.signup-field {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.label,
+.signup-label {
+  color: #cbd5e1;
+  font-size: 0.9rem;
+  font-weight: 600;
+}
+
+.field input,
+.signup-field input {
+  width: 100%;
+  border: 1px solid rgba(148, 163, 184, 0.18);
+  border-radius: 16px;
+  background: rgba(15, 23, 42, 0.72);
+  color: #f8fafc;
+  padding: 14px 16px;
+  font-size: 0.98rem;
+  outline: none;
+  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
+}
+
+.field input::placeholder,
+.signup-field input::placeholder {
+  color: #64748b;
+}
+
+.field input:focus,
+.signup-field input:focus {
+  border-color: rgba(103, 232, 249, 0.7);
+  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.12);
+  transform: translateY(-1px);
+}
+
+.submit-btn,
+.signup-submit-btn,
+.google-btn,
+.signup-google-btn,
+.link-btn,
+.signup-link-btn {
+  font: inherit;
+}
+
+.submit-btn,
+.signup-submit-btn {
+  width: 100%;
+  border: none;
+  border-radius: 16px;
+  padding: 14px 18px;
+  background: linear-gradient(135deg, #22d3ee, #6366f1);
+  color: #eff6ff;
+  font-size: 0.98rem;
+  font-weight: 700;
+  cursor: pointer;
+  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
+  box-shadow: 0 16px 36px rgba(34, 211, 238, 0.2);
+}
+
+.submit-btn:hover,
+.signup-submit-btn:hover,
+.google-btn:hover,
+.signup-google-btn:hover {
+  transform: translateY(-1px);
+}
+
+.submit-btn:active,
+.signup-submit-btn:active,
+.google-btn:active,
+.signup-google-btn:active {
+  transform: translateY(0);
+}
+
+.google-btn,
+.signup-google-btn {
+  width: 100%;
+  border: 1px solid rgba(148, 163, 184, 0.18);
+  border-radius: 16px;
+  padding: 13px 16px;
+  background: rgba(255, 255, 255, 0.03);
+  color: #e2e8f0;
+  font-weight: 600;
+  cursor: pointer;
+  transition: border-color 0.18s ease, background 0.18s ease;
+}
+
+.google-btn:hover,
+.signup-google-btn:hover {
+  border-color: rgba(103, 232, 249, 0.4);
+  background: rgba(255, 255, 255, 0.06);
+}
+
+.divider,
+.signup-divider {
+  position: relative;
+  text-align: center;
+  color: #94a3b8;
+  font-size: 0.84rem;
+  text-transform: uppercase;
+  letter-spacing: 0.14em;
+}
+
+.divider::before,
+.signup-divider::before {
+  content: "";
+  position: absolute;
+  top: 50%;
+  left: 0;
+  right: 0;
+  height: 1px;
+  background: rgba(148, 163, 184, 0.16);
+}
+
+.divider span,
+.signup-divider span {
+  position: relative;
+  padding: 0 12px;
+  background: rgba(9, 14, 28, 0.92);
+}
+
+.switch-row,
+.signup-switch {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  gap: 8px;
+  flex-wrap: wrap;
+  color: #94a3b8;
+  font-size: 0.94rem;
+}
+
+.link-btn,
+.signup-link-btn {
+  border: none;
+  background: none;
+  color: #67e8f9;
+  cursor: pointer;
+  font-weight: 700;
+  padding: 0;
+}
+
+.link-btn:hover,
+.signup-link-btn:hover {
+  color: #a5f3fc;
+}
+
+.panel-deco {
+  position: absolute;
+  width: 180px;
+  height: 180px;
+  border-radius: 999px;
+  filter: blur(12px);
+  opacity: 0.28;
+}
+
+.deco-left {
+  top: -56px;
+  right: -32px;
+  background: radial-gradient(circle, rgba(34, 211, 238, 0.9), transparent 68%);
+}
+
+.deco-right {
+  bottom: -68px;
+  left: -36px;
+  background: radial-gradient(circle, rgba(99, 102, 241, 0.9), transparent 68%);
+}
+
+.auth-footer,
+.signup-footer {
+  padding: 0 0 26px;
+  text-align: center;
+  color: #94a3b8;
+}
+
+@media (max-width: 980px) {
+  .auth-main {
+    grid-template-columns: 1fr;
+    padding-top: 30px;
+  }
+
+  .hero-copy {
+    max-width: none;
+  }
+
+  .feature-row {
+    grid-template-columns: 1fr;
+  }
+
+  .auth-panel-wrap,
+  .signup-panel-wrap {
+    justify-content: stretch;
+  }
+
+  .auth-panel,
+  .signup-panel {
+    width: 100%;
+  }
+}
+
+@media (max-width: 640px) {
+  .auth-header,
+  .signup-header,
+  .auth-main,
+  .signup-main,
+  .auth-footer,
+  .signup-footer {
+    width: min(100% - 24px, 100%);
+  }
+
+  .auth-header,
+  .signup-header {
+    padding-top: 18px;
+  }
+
+  .auth-main,
+  .signup-main {
+    padding-top: 22px;
+    padding-bottom: 18px;
+    gap: 22px;
+  }
+
+  .brand,
+  .signup-brand {
+    width: 100%;
+    justify-content: center;
+  }
+
+  .hero-title {
+    font-size: clamp(2.2rem, 11vw, 3.2rem);
+  }
+
+  .hero-desc {
+    font-size: 0.98rem;
+  }
+
+  .panel-inner,
+  .signup-panel-inner {
+    padding: 24px 18px 22px;
+  }
+
+  .form-title,
+  .signup-form-title {
+    font-size: 1.55rem;
+  }
+}
+
 /* =========================================================
    LANDING PAGE
 ========================================================= */