/* ============================================================
   MAIN.CSS – Global Design System
   Convention: html { font-size: 62.5% } → 1rem = 10px
   Example: 1.6rem = 16px | 2.4rem = 24px | 4.8rem = 48px
   Networld Asia – Digital Marketing Landing Page
   ============================================================ */

/* ---------- Google Font ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;0,900&display=swap');

/* ---------- CSS Variables / Tokens ---------- */
:root {
  /* Brand Colors */
  --color-primary: #0C5EFF;
  --color-primary-dark: #0E50C0;
  --color-primary-light: #4A8FF7;
  --color-accent: #00D4FF;
  --color-secondary: #0A1628;

  /* Neutral */
  --color-bg: #F5F8FF;
  --color-bg-alt: #EBF1FF;
  --color-surface: #FFFFFF;
  --color-border: #D8E3F8;

  /* Text */
  --color-text-primary: #0A1628;
  --color-text-secondary: #303030;
  --color-text-third: #EF5E2C;
  --color-text-muted: #707070;
  --color-text-white: #FFFFFF;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1A6FF4 0%, #00D4FF 100%);
  --gradient-hero-bg: linear-gradient(180deg, #EBF1FF 0%, #F5F8FF 60%, #FFFFFF 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9) 0%, rgba(235, 241, 255, 0.6) 100%);

  /* ── Shadows ──────────────────────────────────────────── */
  --shadow-sm: 0 0.1rem 0.4rem rgba(26, 111, 244, 0.08);
  --shadow-md: 0 0.4rem 2rem rgba(26, 111, 244, 0.12);
  --shadow-lg: 0 1rem 4rem rgba(26, 111, 244, 0.18);
  --shadow-card: 0 0.8rem 3.2rem rgba(10, 22, 40, 0.08);

  /* ── Border Radius ────────────────────────────────────── */
  --radius-sm: 0.8rem;
  /* 8px  */
  --radius-md: 1.2rem;
  /* 12px */
  --radius-lg: 2rem;
  /* 20px */
  --radius-xl: 3.2rem;
  /* 32px */
  --radius-full: 999rem;

  /* ── Spacing (1rem = 10px) ────────────────────────────── */
  --space-xs: 0.4rem;
  /* 4px   */
  --space-sm: 0.8rem;
  /* 8px   */
  --space-md: 1.6rem;
  /* 16px  */
  --space-lg: 2.4rem;
  /* 24px  */
  --space-xl: 4rem;
  /* 40px  */
  --space-2xl: 6.4rem;
  /* 64px  */
  --space-3xl: 9.6rem;
  /* 96px  */
  --space-4xl: 12.8rem;
  /* 128px */

  /* ── Typography Scale (1rem = 10px) ──────────────────── */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-xs: 1.2rem;
  /* 12px */
  --font-sm: 1.4rem;
  /* 14px */
  --font-base: 1.6rem;
  /* 16px */
  --font-md: 1.8rem;
  /* 18px */
  --font-lg: 2rem;
  /* 20px */
  --font-xl: 2.4rem;
  /* 24px */
  --font-2xl: 3.2rem;
  /* 32px */
  --font-3xl: 4rem;
  /* 40px */
  --font-4xl: 4.8rem;
  /* 48px */
  --font-5xl: 6rem;
  /* 60px */

  /* ── Transitions ──────────────────────────────────────── */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── Z-index layers ───────────────────────────────────── */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-toast: 400;

  /* ── Layout ───────────────────────────────────────────── */
  --container-max: 120rem;
  /* 1200px */
  --container-pad: clamp(1.6rem, 4vw, 4.8rem);

  --navbar-h: 7.2rem;
  /* 72px  */

  /* ── Alpha / Semantic Colors ─────────────────────────── */
  --color-primary-hover-bg: rgba(12, 94, 255, 0.05);
  /* hover bg on primary items   */
  --color-primary-subtle: rgba(12, 94, 255, 0.10);
  /* icon badge bg, subtle tints  */
  --color-primary-border: rgba(12, 94, 255, 0.25);
  /* hover border on cards        */
  --color-overlay-dark: rgba(10, 22, 40, 0.40);
  /* mobile menu backdrop         */
  --color-shadow-header: rgba(10, 22, 40, 0.08);
  /* scrolled header shadow       */
  --color-shadow-panel: rgba(10, 22, 40, 0.12);
  /* mobile panel side shadow     */

  /* ── Component Sizes ─────────────────────────────────── */
  --size-icon-sm: 2.8rem;
  /* 28px – contact info icons   */
  --size-icon-md: 3.6rem;
  /* 36px – social link buttons  */
  --size-touch: 4.4rem;
  /* 44px – min tap target       */
}

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

/* ★ 62.5% of 16px browser default = 10px → 1rem = 10px */
html {
  font-size: 62.5%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-base);
  /* 1.6rem = 16px */
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
video {
  max-width: 100%;
  display: block;
}

/* SVG: max-width only – do NOT set display:block here.
   Inline SVG icons inside buttons/links need display:inline (default). */
svg {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-family);
  font-size: inherit;
}

input,
textarea,
select {
  font-family: var(--font-family);
}

/* ---------- Layout Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-3xl);
}

.section--lg {
  padding-block: var(--space-4xl);
}

/* ---------- Typography Utilities ---------- */
.text-primary {
  color: var(--color-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-white {
  color: var(--color-text-white);
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

.font-medium {
  font-weight: 500;
}

/* ---------- Button System ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.2rem 2.8rem;
  border-radius: var(--radius-full);
  font-size: var(--font-base);
  font-weight: 600;
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  border: 0.2rem solid transparent;
  line-height: 1.4;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-white);
}

.btn--primary:hover {
  transform: translateY(-0.2rem);
  box-shadow: 0 0.8rem 2.8rem rgba(26, 111, 244, 0.45);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-text-muted);
}

.btn--outline:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-white);
  transform: translateY(-0.2rem);
  box-shadow: var(--shadow-md);
}

.btn--white {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn--white:hover {
  transform: translateY(-0.2rem);
  box-shadow: var(--shadow-lg);
}

.btn--sm {
  padding: 1rem 4rem;
  font-size: var(--font-sm);
}

.btn--lg {
  padding: 1.6rem 4rem;
  font-size: var(--font-md);
}

/* ---------- Card System ---------- */
.card {
  background: var(--gradient-card);
  border: 0.1rem solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  backdrop-filter: blur(1.2rem);
}

.card:hover {
  transform: translateY(-0.4rem);
  box-shadow: var(--shadow-lg);
  border-color: rgba(26, 111, 244, 0.3);
}

/* ---------- Section Labels ---------- */
.section-eyebrow {
  display: inline-block;
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(26, 111, 244, 0.08);
  padding: 0.4rem 1.6rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(var(--font-2xl), 4vw, var(--font-4xl));
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.section-title--center {
  text-align: center;
}

.section-subtitle {
  font-size: clamp(var(--font-base), 1.5vw, var(--font-md));
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

.section-subtitle--center {
  text-align: center;
  margin-inline: auto;
}

/* ---------- Flex & Grid Utilities ---------- */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.gap-sm {
  gap: var(--space-sm);
}

.gap-md {
  gap: var(--space-md);
}

.gap-lg {
  gap: var(--space-lg);
}

.gap-xl {
  gap: var(--space-xl);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

/* ---------- Badge / Tag ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
}

.badge--primary {
  background: rgba(26, 111, 244, 0.12);
  color: var(--color-primary);
}

.badge--popular {
  background: var(--gradient-primary);
  color: white;
}

/* ---------- Divider ---------- */
.divider {
  border: none;
  height: 0.1rem;
  background: var(--color-border);
  margin-block: var(--space-lg);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 0.6rem;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
}

/* ---------- Selection ---------- */
::selection {
  background: rgba(26, 111, 244, 0.2);
  color: var(--color-primary-dark);
}

/* ---------- Modal System ---------- */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal.is-active {
  opacity: 1;
  visibility: visible;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background-color: var(--color-overlay-dark);
  backdrop-filter: blur(0.4rem);
}

.modal__container {
  position: relative;
  background-color: var(--color-surface);
  width: min(44rem, 90%);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  transform: translateY(2rem);
  transition: transform var(--transition-spring);
  text-align: center;
}

.modal.is-active .modal__container {
  transform: translateY(0);
}

.modal__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.modal__icon-wrap {
  width: 6.4rem;
  height: 6.4rem;
  background-color: rgba(12, 94, 255, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.modal__icon {
  width: 3.2rem;
  height: 3.2rem;
}

.modal__title {
  font-size: var(--font-xl);
  font-weight: 800;
  color: var(--color-text-primary);
}

.modal__desc {
  font-size: var(--font-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

#modal-close-btn {
  width: 100%;
  text-align: center;
  display: flex;
  justify-content: center;
}


/* ---------- Responsive Breakpoints ---------- */
@media (min-width: 1199px) {
  :root {
    --container-max: 140rem;
  }

  .container {
    width: 90%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
  }
}
@media (min-width: 1599px) {
  :root {
    --container-max: 160rem;
  }

  .container {
    width: 90%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
  }
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 6.4rem;
    /* 64px */
    --space-4xl: 8rem;
    /* 80px */
  }

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

@media (max-width: 480px) {
  :root {
    --container-pad: 1.6rem;
    /* 16px */
  }
}