/* Пиксельный шрифт для основного текста теории */
.theory-page-content .section-text,
.theory-page-content .block-text,
.theory-page-content .info-text,
.theory-page-content .step-desc,
.theory-page-content .theory-step-text,
.theory-page-content li,
.theory-page-content p {
  font-family: var(--font-pixel);
  font-size: 15px;
  line-height: 2.2;
  letter-spacing: 0.5px;
}
.theory-page-content .section-text code,
.theory-page-content .info-text code,
.theory-page-content .block-text code,
.theory-page-content .challenge-text code 
{
  font-family: var(--font-pixel);
  font-size: 15px;
}

.theory-page-content {
  max-width: 860px;
}

.theory-hero-emoji {
  font-size: 64px;
  margin-bottom: 16px;
  display: block;
  animation: theory-float 3s ease-in-out infinite;
}
@keyframes theory-float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

/* Теги (Python / Новичок) */
.theory-tags {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 14px;
  flex-wrap: wrap;
}
.ttag {
  font-family: var(--font-pixel);
  font-size: 8px;
  padding: 5px 10px;
  border: 1px solid;
  letter-spacing: 1px;
}
.ttag-green  { color: var(--green);  border-color: var(--green);  background: rgba(57,255,20,0.07); }
.ttag-yellow { color: var(--yellow); border-color: var(--yellow); background: rgba(245,216,0,0.07); }
.ttag-cyan   { color: var(--cyan);   border-color: var(--cyan);   background: rgba(0,229,255,0.07); }
.ttag-level  { color: var(--text-dim); border-color: var(--border-blue); }

/* До/после блоки */
.do-dont-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}
@media (max-width: 600px) {
  .do-dont-grid { grid-template-columns: 1fr; }
}
.do-header, .dont-header {
  font-size: 9px;
  padding: 8px 12px;
  margin-bottom: 0;
  letter-spacing: 1px;
}
.do-header   { color: var(--green);  background: rgba(57,255,20,0.08);  border: 1px solid var(--green);  border-bottom: none; }
.dont-header { color: var(--pink);   background: rgba(255,77,109,0.08); border: 1px solid var(--pink);   border-bottom: none; }
.do-block   .code-block { border-top: none; border-color: var(--green); }
.dont-block .code-block { border-top: none; border-color: var(--pink); }

/* Таблица сравнения */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.compare-table th {
  font-family: var(--font-pixel);
  font-size: 9px;
  padding: 12px 16px;
  text-align: left;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--border-blue);
  color: var(--text-dim);
}
.compare-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-blue);
  color: var(--text-main);
  line-height: 1.5;
  vertical-align: top;
}
.compare-table tr:hover td { background: rgba(0,229,255,0.03); }
.compare-table code {
  font-family: var(--font-pixel);
  font-size: 13px;
  color: var(--cyan);
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.2);
  padding: 2px 6px;
}

/* Сетка операторов */
.ops-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin: 16px 0;
}
.op-card {
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--border-blue);
  padding: 16px 14px;
  text-align: center;
  transition: border-color 0.2s, transform 0.2s;
}
.op-card:hover { border-color: var(--cyan); transform: translateY(-3px); }
.op-sym {
  font-family: var(--font-pixel);
  font-size: 15px;
  color: var(--cyan);
  display: block;
  margin-bottom: 8px;
}
.op-name { font-size: 10px; font-family: var(--font-pixel); letter-spacing: 1px; color: var(--text-dim); margin-bottom: 6px; }
.op-example {
  font-family: var(--font-pixel);
  font-size: 13px;
  color: var(--yellow);
}

/* IP/Сетевые блоки */
.ip-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-wrap: wrap;
  margin: 20px 0;
}
.ip-octet {
  background: rgba(0,0,0,0.5);
  border: 2px solid var(--cyan);
  padding: 14px 18px;
  text-align: center;
  min-width: 72px;
}
.ip-octet-num {
  font-family: var(--font-pixel);
  font-size: 22px;
  color: var(--cyan);
  display: block;
}
.ip-octet-label {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: var(--text-dim);
  display: block;
  margin-top: 4px;
}
.ip-dot {
  font-family: 'Courier New', monospace;
  font-size: 32px;
  color: var(--text-dim);
  padding: 0 2px;
}

/* Шкала-линейка (для масок) */
.bits-row {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
  justify-content: center;
  margin: 16px 0;
}
.bit-box {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  font-weight: bold;
  border: 1px solid var(--border-blue);
}
.bit-box.bit-1 { background: rgba(0,229,255,0.2); border-color: var(--cyan); color: var(--cyan); }
.bit-box.bit-0 { background: rgba(0,0,0,0.3); color: var(--text-dim); }

/* Навигация между страницами */
.theory-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.btn-theory-nav {
  font-size: 9px;
  padding: 12px 20px;
  background: transparent;
  border: 1px solid rgba(0,229,255,0.3);
  color: rgba(0,229,255,0.7);
  text-decoration: none;
  letter-spacing: 1px;
  transition: all 0.2s;
  display: inline-block;
}
.btn-theory-nav:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0,229,255,0.06);
}
.btn-theory-next {
  border-color: rgba(0,229,255,0.5);
  color: var(--cyan);
}
.btn-theory-next:hover {
  background: rgba(0,229,255,0.1);
  box-shadow: 0 0 16px rgba(0,229,255,0.2);
}

/* Список шагов c пиксельными номерами */
.theory-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 16px 0;
  counter-reset: tstep;
}
.theory-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  counter-increment: tstep;
}
.theory-step-num {
  font-family: var(--font-pixel);
  font-size: 14px;
  color: var(--cyan);
  min-width: 32px;
  line-height: 1;
  padding-top: 2px;
}
.theory-step-body { flex: 1; }
.theory-step-title {
  font-family: var(--font-pixel);
  font-size: 11px;
  color: var(--text-bright);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.theory-step-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-main);
}

/* Портретные телефоны и узкие экраны */
@media (max-width: 640px) {
  .theory-page-content {
    padding: 28px 12px 48px;
  }
  .theory-page-content .section-text,
  .theory-page-content .block-text,
  .theory-page-content .info-text,
  .theory-page-content .theory-step-text,
  .theory-page-content .challenge-text {
    font-size: 11px;
    line-height: 1.95;
    letter-spacing: 0.3px;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  .theory-page-content .block-title {
    font-size: 9px;
    line-height: 1.6;
  }
  .theory-hero-emoji {
    font-size: 40px;
    margin-bottom: 10px;
  }
  .theory-tags {
    margin-top: 10px;
    gap: 6px;
  }
  .ttag {
    font-size: 7px;
    padding: 4px 8px;
  }
  .code-block {
    padding: 12px 10px;
    margin: 12px 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .code-block pre {
    font-size: 10px !important;
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-all;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .code-block code {
    display: block;
    min-width: max-content;
  }
  .compare-table {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    font-size: 10px;
  }
  .compare-table th,
  .compare-table td {
    padding: 8px 10px;
    font-size: 9px;
  }
  .ops-grid {
    grid-template-columns: 1fr;
  }
  .ip-octet {
    min-width: 56px;
    padding: 10px 12px;
  }
  .ip-octet-num {
    font-size: 16px;
  }
  .bits-row {
    gap: 2px;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }
  .theory-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .btn-theory-nav {
    width: 100%;
    text-align: center;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .theory-step {
    gap: 12px;
  }
  .theory-step-num {
    font-size: 11px;
    min-width: 26px;
  }
  /* Types grid - single column on mobile */
  .types-grid {
    grid-template-columns: 1fr !important;
    gap: 10px;
  }
  .type-card {
    padding: 14px 12px;
  }
  /* Challenge box adjustments */
  .challenge-box {
    padding: 16px 12px;
  }
  .challenge-text {
    font-size: 11px;
    line-height: 1.8;
  }
  /* Info box adjustments */
  .info-box {
    padding: 12px;
    gap: 10px;
  }
  .info-icon {
    font-size: 20px;
  }
  .info-text {
    font-size: 11px;
  }
}

@media (max-width: 480px) {
  .page-hero .breadcrumb {
    font-size: 6px;
    line-height: 2;
    letter-spacing: 0.5px;
    word-break: break-word;
  }
  .page-hero .page-title {
    font-size: clamp(11px, 4vw, 18px);
    letter-spacing: 1px;
  }
  .page-hero .page-subtitle {
    font-size: 10px;
    line-height: 1.7;
  }
  /* Extra small phone fixes */
  .theory-page-content .section-text,
  .theory-page-content .block-text,
  .theory-page-content .info-text,
  .theory-page-content .theory-step-text,
  .theory-page-content .challenge-text {
    font-size: 10px;
    line-height: 1.85;
  }
  .code-block {
    padding: 10px 8px;
  }
  .code-block pre {
    font-size: 9px !important;
    line-height: 1.5;
  }
  .ip-octet {
    min-width: 48px;
    padding: 8px 10px;
  }
  .ip-octet-num {
    font-size: 14px;
  }
  .ip-octet-label {
    font-size: 8px;
  }
  .ip-dot {
    font-size: 24px;
  }
  .bit-box {
    width: 28px;
    height: 28px;
    font-size: 11px;
  }
  .op-card {
    padding: 12px 10px;
  }
  .op-sym {
    font-size: 13px;
  }
  .op-name {
    font-size: 9px;
  }
  .op-example {
    font-size: 11px;
  }
}

/* PREVENT HORIZONTAL OVERFLOW */
@media (max-width: 640px) {
  .theory-page-content {
    max-width: 100%;
    overflow-x: hidden;
  }
  .content-block {
    max-width: 100%;
    overflow: hidden;
  }
  /* Ensure IP visual doesn't overflow */
  .ip-visual {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    padding: 10px 0;
  }
  /* Ensure bits row doesn't overflow */
  .bits-row {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
    padding: 8px 0;
  }
  /* Code blocks - allow horizontal scroll */
  .code-block {
    max-width: 100%;
  }
  .code-block pre code {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}