/* ===== DOCS LAYOUT ===== */
.docs-layout { display: flex; padding-top: 68px; min-height: 100vh; }

/* SIDEBAR */
.docs-sidebar {
  width: 260px; flex-shrink: 0;
  position: fixed; top: 68px; bottom: 0; left: 0;
  overflow-y: auto; background: var(--bg-gray);
  border-right: 1px solid var(--border); padding: 24px 0;
}
.docs-content {
  margin-left: 260px; flex: 1;
  padding: 48px 48px 80px; max-width: calc(100% - 260px);
}
.sidebar-section { margin-bottom: 24px; }
.sidebar-title {
  font-size: 11px; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text-light); font-weight: 600;
  padding: 0 24px; margin-bottom: 8px;
}
.sidebar-link {
  display: block; padding: 8px 24px; font-size: 14px;
  color: var(--text-mid); transition: all .2s;
  border-left: 3px solid transparent;
}
.sidebar-link:hover {
  color: var(--primary); background: rgba(238,80,80,.04);
}
.sidebar-link.active {
  color: var(--primary); font-weight: 600;
  border-left-color: var(--primary); background: rgba(238,80,80,.06);
}

/* HERO */
.docs-hero {
  padding: 48px 0 32px; border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}
.docs-hero h1 { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
.docs-hero p  { font-size: 17px; color: var(--text-mid); max-width: 640px; }

/* SECTION HEADINGS */
.docs-section-heading { font-size: 24px; margin-bottom: 16px; }
.docs-section-subheading { font-size: 20px; margin-bottom: 12px; }

/* SECTIONS */
.endpoint-card {
  margin-bottom: 40px; padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.endpoint-method {
  display: inline-block; padding: 4px 12px; border-radius: 6px;
  font-size: 13px; font-weight: 700;
  font-family: 'JetBrains Mono', monospace; margin-right: 12px;
}
.method-post   { background: #e8f5e9; color: #2e7d32; }
.method-get    { background: #e3f2fd; color: #1565c0; }
.method-put    { background: #fff3e0; color: #e65100; }
.method-delete { background: #fce4ec; color: #c62828; }
.endpoint-path {
  font-size: 17px; font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}
.endpoint-card h3  { font-size: 24px; margin-top: 16px; margin-bottom: 8px; }
.endpoint-card > p { font-size: 15px; color: var(--text-mid); margin-bottom: 20px; }

/* Repeated paragraph spacing inside endpoint cards */
.endpoint-card-p { font-size: 15px; color: var(--text-mid); margin-bottom: 16px; }

/* Sub-headings inside endpoint cards (Request Body, Example, Response) */
.docs-table-label { font-size: 16px; margin-top: 20px; margin-bottom: 8px; }

/* QUICK START STEPS */
.quickstart-steps { display: flex; gap: 32px; margin-bottom: 24px; }
.quickstart-step {
  flex: 1; text-align: center; padding: 20px;
  background: var(--bg-gray); border-radius: 12px;
}
.quickstart-step .step-num {
  font-size: 36px; font-weight: 700; color: var(--primary);
  margin-bottom: 8px;
}
.quickstart-step .step-title { font-size: 14px; font-weight: 600; }
.quickstart-step .step-desc  { font-size: 13px; color: var(--text-mid); }

/* CODE BLOCKS */
.code-block {
  background: var(--code-bg); border-radius: 12px;
  padding: 20px 24px; margin: 16px 0;
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
  line-height: 1.8; overflow-x: auto; color: var(--code-text);
  position: relative;
}
.code-block pre {
  margin: 0; padding: 0;
  font-family: inherit; font-size: inherit; line-height: inherit;
  color: inherit; white-space: pre; overflow-x: visible;
  background: transparent; border: none;
}
.code-block .comment { color: #737e97; }
.code-block .string  { color: var(--accent); }
.code-block .keyword { color: var(--primary); }
.code-block .func    { color: #63b1bd; }
.code-block .key     { color: #a8d8ea; }

/* ===== LANGUAGE TABS ===== */
.lang-tabs {
  display: flex;
  margin-bottom: 24px;
}
.lang-tabs-inner {
  display: inline-flex;
  background: var(--bg-gray);
  border-radius: 12px;
  padding: 5px;
  gap: 4px;
  flex-wrap: wrap;
}
.lang-tab {
  padding: 10px 20px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--text-mid);
  transition: all .2s ease;
  font-family: inherit;
}
.lang-tab:hover {
  color: var(--primary);
  background: rgba(238,80,80,.06);
}
.lang-tab.active {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

/* Code language label inside code block */
.code-lang-label {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(238,146,80,.15);
  margin-bottom: 12px;
}

.copy-btn {
  position: absolute; top: 12px; right: 12px;
  background: rgba(255,255,255,.08); border: none;
  color: rgba(255,255,255,.5); padding: 6px 12px;
  border-radius: 6px; font-size: 12px; cursor: pointer;
  transition: all .2s;
}
.copy-btn:hover { background: rgba(255,255,255,.15); color: #fff; }

/* TABLES */
.api-table {
  width: 100%; border-collapse: collapse; margin: 16px 0;
  font-size: 14px;
}
.api-table th {
  text-align: left; padding: 10px 16px;
  background: var(--bg-gray); font-weight: 600;
  border-bottom: 2px solid var(--border);
}
.api-table td {
  padding: 10px 16px; border-bottom: 1px solid var(--border);
}
.api-table tr:hover td { background: rgba(238,80,80,.02); }

/* TABLE BADGES */
.type-badge {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 12px; font-family: 'JetBrains Mono', monospace;
  background: var(--primary-light); color: var(--primary);
}
.required-badge { color: var(--error); font-size: 12px; font-weight: 600; }
.optional-badge { color: var(--text-light); font-size: 12px; }
.inline-code {
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
  background: var(--bg-gray); padding: 2px 8px; border-radius: 4px;
}
.table-code {
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
}

/* SDK CARDS */
.sdk-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; margin: 24px 0;
}
.sdk-card {
  background: var(--bg-gray); border-radius: 12px;
  padding: 24px; border: 1px solid var(--border);
  transition: all .3s;
}
.sdk-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(238,80,80,.15);
}
.sdk-card h4  { font-size: 16px; margin-bottom: 8px; }
.sdk-card p   { font-size: 13px; color: var(--text-mid); margin-bottom: 12px; }
.sdk-card code {
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  background: var(--code-bg); color: var(--code-text);
  padding: 4px 8px; border-radius: 4px;
}

/* ERROR CODES */
.error-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 12px; margin: 16px 0;
}
.error-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--bg-gray);
  border-radius: 8px; font-size: 14px;
}
.error-code {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700; min-width: 48px;
}
.error-code--client { color: var(--error); }
.error-code--server { color: var(--error); }
.error-code--warn   { color: var(--warning); }
.error-code--info   { color: #1565c0; }

/* SMPP error items: richer layout with constant name + meaning + scenario */
.error-item--smpp {
  flex-wrap: wrap;
  gap: 4px 12px;
}
.smpp-const {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-mid);
  background: var(--code-bg);
  color: #a8d8ea;
  padding: 2px 8px;
  border-radius: 4px;
  line-height: 1.5;
}
.smpp-meaning {
  flex-basis: 100%;
  font-weight: 500;
  margin-top: 2px;
}
.smpp-scenario {
  flex-basis: 100%;
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.4;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .docs-sidebar { display: none; }
  .docs-content { margin-left: 0; max-width: 100%; padding: 32px 24px 60px; }
  .sdk-grid { grid-template-columns: repeat(2, 1fr); }
  .quickstart-steps { flex-direction: column; }
}

@media (max-width: 768px) {
  .sdk-grid   { grid-template-columns: 1fr; }
  .error-grid { grid-template-columns: 1fr; }
  .docs-hero h1 { font-size: 28px; }
  .docs-hero { padding: 32px 0 24px; margin-bottom: 24px; }
  .code-block { font-size: 12px; padding: 16px; }
  .copy-btn { top: 8px; right: 8px; padding: 4px 10px; font-size: 11px; }
}

@media (max-width: 480px) {
  .docs-content { padding: 24px 16px 48px; }
  .docs-hero h1 { font-size: 24px; }
  .endpoint-card h3, .docs-section-heading { font-size: 20px; }
  .docs-section-subheading { font-size: 17px; }
  .code-block { font-size: 11px; }
}

/* Docs sidebar toggle button (shown on mobile when sidebar hidden) */
.docs-sidebar-toggle {
  display: none;
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--gradient-primary); color: #fff; border: none;
  font-size: 20px; cursor: pointer; box-shadow: 0 4px 16px rgba(238,80,80,.35);
  align-items: center; justify-content: center;
}
@media (max-width: 1024px) {
  .docs-sidebar-toggle { display: flex; }
}