/* ============================================
   iSMART Innovations Inc. — Corporate Website
   style.css — Shared Styles
   ============================================ */

/* --- Brand Colors (extracted from iSMART company profile) --- */
:root {
  --navy: #1B2D5B;
  --navy-dark: #0F1D3D;
  --cyan: #00B4D8;
  --cyan-light: #4DD9F0;
  --cyan-pale: #E0F7FB;
  --blue-mid: #2E6EA6;
  --bg-light: #F5F8FA;
  --bg-white: #FFFFFF;
  --text-dark: #1A1A2E;
  --text-body: #3A3A4A;
  --text-muted: #6B7280;
  --border-light: #E2E8F0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-width: 1120px;
  --font-body: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--navy); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--navy);
  line-height: 1.25;
  font-weight: 700;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 0.5em; }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.35rem); }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 4rem 0;
}

.section--alt {
  background: var(--bg-light);
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}

.section__title {
  margin-bottom: 1rem;
}

.section__intro {
  max-width: 640px;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.02em;
}

.site-logo span {
  color: var(--cyan);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-links a {
  display: block;
  padding: 0.5rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-body);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--cyan-pale);
  color: var(--navy);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--navy);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform 0.25s ease;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links a {
    padding: 0.75rem 0.5rem;
    font-size: 1rem;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--primary {
  background: var(--cyan);
  color: #fff;
}

.btn--primary:hover {
  background: #009bb8;
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--navy);
  border: 1.5px solid var(--navy);
}

.btn--outline:hover {
  background: var(--navy);
  color: #fff;
}

.btn--white {
  background: #fff;
  color: var(--navy);
}

.btn--white:hover {
  background: var(--cyan-pale);
  color: var(--navy);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 60%, var(--blue-mid) 100%);
  color: #fff;
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,180,216,0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 620px;
}

.hero__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan-light);
  margin-bottom: 1rem;
}

.hero h1 {
  color: #fff;
  margin-bottom: 1rem;
}

.hero p {
  color: rgba(255,255,255,0.8);
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
  max-width: 520px;
}

/* --- Cards grid --- */
.card-grid {
  display: grid;
  gap: 1.5rem;
}

.card-grid--2 { grid-template-columns: 1fr; }
.card-grid--3 { grid-template-columns: 1fr; }
.card-grid--4 { grid-template-columns: 1fr; }

@media (min-width: 600px) {
  .card-grid--2 { grid-template-columns: repeat(2, 1fr); }
  .card-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .card-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .card-grid--4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__icon {
  width: 44px;
  height: 44px;
  background: var(--cyan-pale);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--cyan);
  font-size: 1.25rem;
}

.card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* --- Ecosystem / Brand cards --- */
.brand-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  transition: box-shadow var(--transition);
}

.brand-card:hover {
  box-shadow: var(--shadow-md);
}

.brand-card__badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.brand-card__badge--platform {
  background: var(--cyan-pale);
  color: var(--cyan);
}

.brand-card__badge--product {
  background: #E8F0FE;
  color: var(--navy);
}

.brand-card__badge--coming {
  background: #FEF3C7;
  color: #92400E;
}

.brand-card__name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.brand-card__desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* --- Team section --- */
.team-card {
  text-align: center;
}

.team-card__photo {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--border-light);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  overflow: hidden;
  border: 3px solid var(--cyan-pale);
}

.team-card__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.15rem;
}

.team-card__role {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}

.team-card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Partners --- */
.partner-block {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.partner-block__logo {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-align: center;
}

.partner-block__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.partner-block__desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* --- Platform diagram --- */
.platform-diagram {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.diagram-level {
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  display: inline-block;
  margin-bottom: 0;
}

.diagram-level--top {
  background: var(--navy);
  color: #fff;
}

.diagram-level--mid {
  background: var(--cyan);
  color: #fff;
}

.diagram-level--bottom {
  background: var(--cyan-pale);
  color: var(--navy);
}

.diagram-arrow {
  display: block;
  text-align: center;
  font-size: 1.5rem;
  color: var(--text-muted);
  margin: 0.5rem 0;
  line-height: 1;
}

/* --- Table (product page) --- */
.clean-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-top: 1rem;
}

.clean-table th,
.clean-table td {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-light);
}

.clean-table th {
  font-weight: 700;
  color: var(--navy);
  background: var(--bg-light);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.clean-table td {
  color: var(--text-body);
}

/* --- CTA Block --- */
.cta-block {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  color: #fff;
  padding: 3.5rem 0;
  text-align: center;
}

.cta-block h2 {
  color: #fff;
  margin-bottom: 0.75rem;
}

.cta-block p {
  color: rgba(255,255,255,0.75);
  max-width: 480px;
  margin: 0 auto 1.5rem;
}

.cta-block .btn-group {
  justify-content: center;
}

/* --- Contact Form --- */
.form-grid {
  display: grid;
  gap: 1.25rem;
  max-width: 560px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.35rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  font-size: 0.95rem;
  font-family: var(--font-body);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-white);
  color: var(--text-dark);
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--cyan);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group .error-msg {
  display: none;
  font-size: 0.78rem;
  color: #DC2626;
  margin-top: 0.25rem;
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: #DC2626;
}

.form-group.has-error .error-msg {
  display: block;
}

/* Thank you state */
.thank-you {
  display: none;
  text-align: center;
  padding: 3rem 1rem;
}

.thank-you.visible {
  display: block;
}

.thank-you__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.25rem;
  background: var(--cyan-pale);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  font-size: 1.75rem;
}

.thank-you h2 {
  margin-bottom: 0.5rem;
}

.thank-you p {
  color: var(--text-muted);
  max-width: 400px;
  margin: 0 auto 1.5rem;
}

/* --- Contact info blocks --- */
.contact-info-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 600px) {
  .contact-info-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.contact-info-item__icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--cyan-pale);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  font-size: 0.9rem;
}

.contact-info-item__label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.contact-info-item__value {
  font-size: 0.92rem;
  color: var(--text-dark);
  margin-top: 0.1rem;
}

/* --- Footer --- */
.site-footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.65);
  padding: 2.5rem 0;
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-nav {
  display: flex;
  list-style: none;
  gap: 1.25rem;
}

.footer-nav a {
  color: rgba(255,255,255,0.65);
  font-size: 0.85rem;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--cyan-light);
}

.footer-brand {
  font-weight: 700;
  color: #fff;
}

.footer-brand span {
  color: var(--cyan-light);
}

/* --- Image placeholder --- */
.img-placeholder {
  background: var(--bg-light);
  border: 1px dashed var(--border-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
  min-height: 200px;
  padding: 1rem;
}

/* --- Market position highlight --- */
.position-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .position-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.position-card {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--border-light);
}

.position-card--highlight {
  background: var(--cyan-pale);
  border-color: var(--cyan);
}

.position-card__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.position-card__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.position-card__desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* --- Safety callout --- */
.safety-callout {
  background: #FEF3C7;
  border-left: 4px solid #F59E0B;
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  font-size: 0.9rem;
  color: #78350F;
}

.safety-callout strong {
  display: block;
  margin-bottom: 0.25rem;
  color: #92400E;
}

/* --- Two-column layout --- */
.two-col {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 768px) {
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

/* --- Why Choose Us — alt cards --- */
.why-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.why-card__num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--navy);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.why-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.2rem;
}

.why-card__text {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* --- Usage/application steps --- */
.usage-steps {
  display: grid;
  gap: 1.25rem;
}

.usage-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.usage-step__num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--cyan);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.usage-step__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.2rem;
}

.usage-step__text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Contact preview (homepage) --- */
.contact-preview {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

/* --- Misc utilities --- */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* --- Skip to content (accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--navy);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 200;
  font-size: 0.85rem;
}
.skip-link:focus {
  top: 0;
}