/* ===========================
   AMZA STUDENT & RESEARCH TOOLS
   styles.css
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

:root {
  --orange: #e8431a;
  --orange-light: #ff6b3d;
  --orange-dark: #c73510;
  --bg: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,0.07), 0 4px 16px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.13);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-w: 1200px;
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--gray-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font-body); }

/* ===== LAYOUT ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ===== NAVBAR ===== */
#navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}
#navbar.scrolled { box-shadow: var(--shadow-md); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.nav-logo span { color: var(--orange); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--gray-700);
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  background: var(--gray-100);
  color: var(--orange);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--gray-50) 0%, #fff5f2 50%, #fff 100%);
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(232,67,26,0.07) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-tag {
  display: inline-block;
  background: rgba(232,67,26,0.10);
  color: var(--orange);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--gray-900);
  margin-bottom: 18px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 em {
  font-style: normal;
  color: var(--orange);
}
.hero p {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 560px;
  margin: 0 auto 36px;
}
.search-wrap {
  max-width: 540px;
  margin: 0 auto;
  position: relative;
}
.search-wrap input {
  width: 100%;
  padding: 14px 56px 14px 20px;
  border-radius: 50px;
  border: 2px solid var(--gray-200);
  font-family: var(--font-body);
  font-size: 1rem;
  background: #fff;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}
.search-wrap input:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(232,67,26,0.12);
}
.search-wrap button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--orange);
  color: #fff;
  border: none;
  border-radius: 50px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background var(--transition);
}
.search-wrap button:hover { background: var(--orange-dark); }

/* ===== AD UNIT ===== */
.ad-unit {
  max-width: 900px;
  margin: 32px auto;
  background: var(--gray-50);
  border: 1px dashed var(--gray-300);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 90px;
}

/* ===== SECTION HEADINGS ===== */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 10px;
}
.section-header p {
  color: var(--gray-500);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}
.section-header .accent { color: var(--orange); }

/* ===== CATEGORIES ===== */
.categories-section { padding: 48px 0 24px; }
.cat-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.cat-pill {
  padding: 8px 18px;
  border-radius: 50px;
  border: 1.5px solid var(--gray-200);
  background: #fff;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition);
}
.cat-pill:hover, .cat-pill.active {
  border-color: var(--orange);
  background: var(--orange);
  color: #fff;
}

/* ===== TOOLS GRID ===== */
.tools-section { padding: 24px 0 64px; }
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.tool-card {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tool-card:hover {
  border-color: var(--orange);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.tool-icon {
  width: 44px;
  height: 44px;
  background: rgba(232,67,26,0.09);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}
.tool-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
}
.tool-card p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.5;
  flex: 1;
}
.tool-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--orange);
  background: rgba(232,67,26,0.09);
  padding: 2px 10px;
  border-radius: 50px;
  align-self: flex-start;
}
.tool-arrow {
  position: absolute;
  top: 22px;
  right: 22px;
  color: var(--gray-300);
  transition: color var(--transition), transform var(--transition);
  font-size: 1rem;
}
.tool-card:hover .tool-arrow {
  color: var(--orange);
  transform: translateX(3px);
}

/* ===== TOOL PAGE ===== */
#tool-page { display: none; padding: 40px 0 80px; }
.tool-page-inner { max-width: 860px; margin: 0 auto; }
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-500);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 28px;
  border: none;
  background: none;
  transition: color var(--transition);
}
.back-btn:hover { color: var(--orange); }
.tool-page-header { margin-bottom: 28px; }
.tool-page-header h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.tool-page-header p { color: var(--gray-500); font-size: 1rem; }
.tool-ui {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

/* Tool UI elements */
.tool-row { display: flex; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.tool-col { flex: 1; min-width: 220px; }
.tool-label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.tool-input, .tool-select, .tool-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--gray-900);
  background: var(--gray-50);
  outline: none;
  transition: border-color var(--transition);
}
.tool-input:focus, .tool-select:focus, .tool-textarea:focus {
  border-color: var(--orange);
  background: #fff;
}
.tool-textarea { min-height: 140px; resize: vertical; }
.tool-output {
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 14px;
  font-size: 0.93rem;
  color: var(--gray-700);
  min-height: 60px;
  white-space: pre-wrap;
  font-family: 'Courier New', monospace;
  word-break: break-all;
  line-height: 1.6;
}
.tool-output.result-text {
  font-family: var(--font-body);
  word-break: normal;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 22px;
  border-radius: 50px;
  border: none;
  font-family: var(--font-body);
  font-size: 0.93rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-dark); transform: translateY(-1px); }
.btn-ghost {
  background: var(--gray-100);
  color: var(--gray-700);
}
.btn-ghost:hover { background: var(--gray-200); }
.btn-sm { padding: 7px 16px; font-size: 0.85rem; }
.stats-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.stat-badge {
  background: var(--gray-100);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.83rem;
  color: var(--gray-700);
}
.stat-badge strong {
  display: block;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--orange);
  font-family: var(--font-display);
}

/* ===== STATIC PAGES ===== */
#static-page { display: none; padding: 60px 0 80px; }
.static-inner { max-width: 820px; margin: 0 auto; }
.static-inner h1 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--gray-900);
}
.static-inner .lead {
  font-size: 1.1rem;
  color: var(--gray-500);
  margin-bottom: 36px;
}
.static-inner h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin: 30px 0 10px;
  color: var(--gray-900);
}
.static-inner p { color: var(--gray-700); margin-bottom: 14px; line-height: 1.75; }
.static-inner ul { padding-left: 22px; margin-bottom: 14px; }
.static-inner ul li { color: var(--gray-700); margin-bottom: 7px; line-height: 1.7; }

/* Contact form */
.contact-form { margin-top: 28px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--gray-700);
  margin-bottom: 7px;
}
.form-group input, .form-group textarea {
  width: 100%;
  padding: 11px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--gray-50);
  outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--orange);
  background: #fff;
}
.form-group textarea { min-height: 130px; resize: vertical; }
.form-success {
  display: none;
  background: #f0fdf4;
  border: 1.5px solid #bbf7d0;
  color: #166534;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-top: 14px;
}

/* ===== ACADEMIC GUIDE TOGGLE ===== */
.academic-guide {
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}
.guide-toggle-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-700);
  text-align: left;
  transition: color var(--transition);
}
.guide-toggle-btn:hover { color: var(--orange); }
.guide-toggle-icon {
  width: 26px;
  height: 26px;
  background: var(--orange);
  border-radius: 50%;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.guide-content {
  display: none;
  padding: 0 24px 32px;
}
.guide-content.open { display: block; }
.guide-content h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin: 28px 0 10px;
  color: var(--gray-900);
}
.guide-content h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 20px 0 8px;
  color: var(--orange);
}
.guide-content p { color: var(--gray-700); margin-bottom: 12px; line-height: 1.75; font-size: 0.95rem; }
.guide-content ul { padding-left: 22px; margin-bottom: 12px; }
.guide-content ul li { color: var(--gray-700); margin-bottom: 6px; line-height: 1.7; font-size: 0.95rem; }

/* ===== FOOTER ===== */
footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 48px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 12px;
  color: var(--gray-500);
}
.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul li a {
  font-size: 0.88rem;
  color: var(--gray-500);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--orange); }
.footer-bottom {
  border-top: 1px solid #1f2937;
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom p { font-size: 0.85rem; color: var(--gray-500); }
.footer-bottom a { color: var(--orange); }

/* ===== SERVICES CARDS ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 24px;
}
.service-card {
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}
.service-card:hover {
  border-color: var(--orange);
  box-shadow: var(--shadow-md);
}
.service-card .svc-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}
.service-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.service-card p { font-size: 0.87rem; color: var(--gray-500); line-height: 1.6; }

/* ===== POMODORO TIMER ===== */
.timer-display {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 800;
  color: var(--orange);
  text-align: center;
  margin: 20px 0;
  letter-spacing: 0.04em;
}
.timer-controls { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* ===== COLOR PICKER ===== */
.color-preview {
  width: 100%;
  height: 100px;
  border-radius: var(--radius);
  border: 1.5px solid var(--gray-200);
  margin-bottom: 14px;
  transition: background 0.3s;
}

/* ===== MATRIX CALC ===== */
.matrix-grid {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}
.matrix-input {
  width: 58px;
  padding: 7px;
  text-align: center;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  font-size: 0.9rem;
  background: var(--gray-50);
  outline: none;
}
.matrix-input:focus { border-color: var(--orange); }

/* ===== PROGRESS BAR ===== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--gray-200);
  border-radius: 50px;
  overflow: hidden;
  margin: 16px 0;
}
.progress-fill {
  height: 100%;
  background: var(--orange);
  border-radius: 50px;
  transition: width 0.6s ease;
}

/* Pomodoro circle */
.pomo-ring {
  display: flex;
  justify-content: center;
  margin: 16px 0;
}
.pomo-ring svg { transform: rotate(-90deg); }
.pomo-ring circle { transition: stroke-dashoffset 1s linear; }

/* ===== MARKDOWN PREVIEW ===== */
.md-preview {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px;
  min-height: 140px;
  font-size: 0.95rem;
  line-height: 1.7;
}
.md-preview h1,.md-preview h2,.md-preview h3 { font-family: var(--font-display); margin-bottom: 8px; }
.md-preview code { background: var(--gray-100); padding: 2px 6px; border-radius: 4px; font-size: 0.88em; }
.md-preview pre { background: var(--gray-100); padding: 14px; border-radius: 8px; overflow-x: auto; }
.md-preview blockquote { border-left: 3px solid var(--orange); padding-left: 14px; color: var(--gray-500); }
.md-preview a { color: var(--orange); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--gray-200); padding: 12px; flex-direction: column; gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  #navbar { position: relative; }
  .hero { padding: 52px 0 44px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .tool-ui { padding: 20px 16px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
}

/* ===== UTILITY ===== */
.hidden { display: none !important; }
.text-orange { color: var(--orange); }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { gap: 8px; }