From a4c933b62cec3d79cd64f14de66a0494fbc1f544 Mon Sep 17 00:00:00 2001
From: Maxim Dolgolyov <maxim.dolgolyov@gmail.com>
Date: Fri, 29 May 2026 10:49:53 +0300
Subject: [PATCH] =?UTF-8?q?fix(textbooks):=20=D0=B4=D0=BE=D0=B1=D0=B0?=
 =?UTF-8?q?=D0=B2=D0=BB=D0=B5=D0=BD=D1=8B=20CSS-=D0=BE=D0=B1=D0=BB=D0=BE?=
 =?UTF-8?q?=D0=B6=D0=BA=D0=B8=20=D0=B4=D0=BB=D1=8F=20teal/cyan/emerald?=
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Карточка 'Алгебра — 10 класс' в каталоге не показывала
заголовок и градиентный фон, потому что у учебника
color='teal', а CSS-правила .tb-cover.teal не было.

Добавлены 4 цвета на будущее (для алгебры 10 теal, для
геометрии 10 cyan/emerald, для амбер вариант).
---
 frontend/textbooks.html | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/frontend/textbooks.html b/frontend/textbooks.html
index 49c2976..6232549 100644
--- a/frontend/textbooks.html
+++ b/frontend/textbooks.html
@@ -51,6 +51,10 @@
     .tb-cover.pink   { background:linear-gradient(135deg, #be185d 0%, #db2777 60%, #ec4899 100%); }
     .tb-cover.indigo { background:linear-gradient(135deg, #3730a3 0%, #4f46e5 60%, #818cf8 100%); }
     .tb-cover.rose   { background:linear-gradient(135deg, #9f1239 0%, #e11d48 60%, #fb7185 100%); }
+    .tb-cover.teal   { background:linear-gradient(135deg, #134e4a 0%, #0d9488 60%, #14b8a6 100%); }
+    .tb-cover.cyan   { background:linear-gradient(135deg, #164e63 0%, #0891b2 60%, #22d3ee 100%); }
+    .tb-cover.emerald{ background:linear-gradient(135deg, #064e3b 0%, #059669 60%, #34d399 100%); }
+    .tb-cover.amber-light{ background:linear-gradient(135deg, #92400e 0%, #d97706 60%, #fbbf24 100%); }
 
     .tb-cover::before {
       content: attr(data-watermark);