/* ===========================================
   FLOWBRAIN — Base Styles
   Aurora Dark Theme
   =========================================== */

body {
  font-family: var(--font-body);
  font-size: var(--body-size);
  font-weight: 400;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Container ---- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* ---- Section ---- */
.section {
  padding: var(--section-py) 0;
  position: relative;
  overflow: hidden;
}

.section--dark {
  background: var(--color-bg-2);
  color: var(--color-text-primary);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-text-primary);
}

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

.section--light {
  background: var(--color-bg-3);
}

/* ---- Typography ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
}

h1 { font-size: var(--hero-size); font-weight: 900; }
h2 { font-size: var(--h2-size); }
h3 { font-size: var(--h3-size); font-weight: 700; }

p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
}

.section--dark .label {
  color: var(--color-accent-light);
}

.section__header {
  margin-bottom: 64px;
}

.section__header p {
  max-width: 520px;
  margin-top: 20px;
  font-size: 1.0625rem;
  line-height: 1.65;
}

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

.text-center .section__header p {
  margin-inline: auto;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  border-radius: 60px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--small-size);
  transition: all var(--duration-fast) ease;
  white-space: nowrap;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--gradient-glow);
  color: var(--color-bg);
  box-shadow: var(--glow-accent);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #00d9a3, #00c896);
  transform: translateY(-2px);
  box-shadow: var(--glow-accent-hover);
}

.btn--white {
  background: var(--glass-bg-strong);
  color: var(--color-text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn--white:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
}

.btn--dark {
  background: var(--color-bg-2);
  color: var(--color-text-primary);
  border: 1px solid var(--glass-border);
}

.btn--dark:hover {
  background: var(--color-bg-3);
  transform: translateY(-2px);
  border-color: var(--glass-border-hover);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid rgba(255,255,255,0.15);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.3);
  box-shadow: var(--glow-accent-soft);
}

.btn--sm {
  padding: 10px 24px;
  font-size: 0.8125rem;
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-fast) ease;
}

.btn:hover svg {
  transform: translateX(3px);
}

/* ---- Image utilities ---- */
.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-rounded {
  border-radius: var(--img-radius);
  overflow: hidden;
}

.img-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--img-radius);
}

.img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.img-wrapper:hover img {
  transform: scale(1.04);
}

/* Image with overlay gradient */
.img-overlay {
  position: relative;
}

.img-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5,5,16,0.7) 0%, rgba(5,5,16,0) 50%);
  border-radius: inherit;
  pointer-events: none;
}

/* ---- Grids ---- */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--card-gap); }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: var(--card-gap); }

/* ---- Split layout (image + text) ---- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split--reverse {
  direction: rtl;
}

.split--reverse > * {
  direction: ltr;
}

/* ---- Divider ---- */
.divider {
  width: 100%;
  height: 1px;
  background: var(--glass-border);
}

.section--dark .divider {
  background: var(--glass-border);
}

/* ---- Screen reader ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* ===========================================
   Aurora Dark — Utility Classes
   =========================================== */

/* ---- Gradient text ---- */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Glassmorphism card ---- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
}

.glass:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
}

/* ---- Tech grid overlay ---- */
.tech-grid {
  position: relative;
}

.tech-grid::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 70%);
}

/* ---- Glow text (for labels/accents) ---- */
.glow-text {
  text-shadow: 0 0 20px rgba(0, 200, 150, 0.4);
}