/* ===== TA:DATA Design System ===== */
/* Dark analytics bureau — navy + neon green, inspired by presentation */

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

/* --- Tokens --- */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3.5rem,   1rem    + 8vw,    9rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Colors — TA:DATA brand: dark navy + neon green */
  --color-bg:           #0a1628;
  --color-surface:      #0e1e35;
  --color-surface-2:    #132742;
  --color-border:       #1e3a5f;
  --color-border-accent: #39ff14;
  --color-accent:       #39ff14;
  --color-accent-dim:   #2bcc10;
  --color-accent-glow:  rgba(57, 255, 20, 0.15);
  --color-text:         #e8eaf0;
  --color-text-muted:   #8a94a8;
  --color-text-faint:   #4d5a72;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Arial Black', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(57, 255, 20, 0.1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }
button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"] {
  transition: color var(--transition-fast),
              background var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

::selection {
  background: rgba(57, 255, 20, 0.25);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.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;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-10); }
}

/* --- Accent helper --- */
.accent { color: var(--color-accent); }

/* Pulsing colon animation */
.accent-pulse {
  color: var(--color-accent);
  animation: colonPulse 1.5s ease-in-out infinite;
}

@keyframes colonPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

/* --- Section Label --- */
.section-label {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-12);
  padding-left: var(--space-5);
  border-left: 3px solid var(--color-accent);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg);
}

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

/* ===========================
   HEADER
   =========================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

/* header always visible — no hide on scroll */
.header--scrolled { box-shadow: 0 1px 0 rgba(57, 255, 20, 0.1); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.header__logo {
  text-decoration: none;
  color: var(--color-accent);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.header__nav ul {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.header__nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.header__nav a:hover {
  color: var(--color-accent);
}

/* Header right group */
.header__right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Language Switcher */
.lang-switch {
  display: flex;
  gap: var(--space-2);
}

.lang-switch__btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 48px;
  text-align: center;
}

.lang-switch__btn:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.lang-switch__btn--active {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.lang-switch__btn--active:hover {
  color: var(--color-bg);
  border-color: var(--color-accent);
}

/* Hamburger */
.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

.header__menu-btn span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.2s;
}

.header__menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header__menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.header__menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 767px) {
  .header__nav { display: none; }
  .header__menu-btn { display: flex; }
}

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(10, 22, 40, 0.97);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out);
}

.mobile-nav[aria-hidden="false"] {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav ul {
  list-style: none;
  text-align: center;
}

.mobile-nav li + li { margin-top: var(--space-8); }

.mobile-nav a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.mobile-nav a:hover { color: var(--color-accent); }

/* ===========================
   HERO
   =========================== */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 4rem;
}

.hero__inner {
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero__label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  text-align: center;
  max-width: none;
  width: 100%;
  display: block;
  margin-inline: auto;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-6);
  text-align: center;
  width: 100%;
}

.hero__tagline {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 500px;
  margin-inline: auto;
  margin-bottom: var(--space-10);
}

/* Grid background decoration */
.hero__grid-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 80%);
}

/* ===========================
   ABOUT
   =========================== */
.about {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.about__text-block {
  max-width: 800px;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.about__quote {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.about__text-block p + p {
  margin-top: var(--space-4);
}

.about__highlight {
  color: var(--color-accent);
  font-weight: 600;
}

/* ===========================
   FOUNDERS
   =========================== */
.founders {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}

.founders__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

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

.founder-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.founder-card__photo {
  overflow: hidden;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-6) 0;
}

.founder-card__photo img {
  width: 280px;
  height: 280px;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
}

.founder-card__info {
  padding: var(--space-6);
}

.founder-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.founder-card__role {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.founder-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.founder-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.founder-card__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}

.founder-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* ===========================
   PRODUCTS
   =========================== */
.products {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.product {
  margin-bottom: var(--space-16);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.product:last-child { margin-bottom: 0; }

.product__header {
  padding: var(--space-8) var(--space-8) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.product__number {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.product__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.product__subtitle {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.product__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-8);
}

@media (min-width: 768px) {
  .product__body {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .product__result {
    grid-column: 1 / -1;
  }
}

.product__problem, .product__solution, .product__result {
  padding: var(--space-5);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.product__problem h3,
.product__solution h3,
.product__result h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.product__problem-title {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.product__problem p,
.product__result p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.product__solution ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.product__solution li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-6);
  position: relative;
}

.product__solution li::before {
  content: '✔';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: var(--text-sm);
}

.product__result ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.product__result li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}

.product__result li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.product__tagline {
  padding: var(--space-4) var(--space-8);
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ===========================
   PRICING
   =========================== */
.pricing {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}

.pricing__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.pricing__table {
  min-width: 700px;
  font-variant-numeric: tabular-nums;
}

.pricing__table th {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: left;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.pricing__table td {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid rgba(30, 58, 95, 0.5);
  vertical-align: top;
}

.pricing__group-start td {
  border-top: 1px solid var(--color-border);
}

.pricing__product-name {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text) !important;
  font-size: var(--text-sm) !important;
  letter-spacing: 0.02em;
  vertical-align: middle !important;
}

.pricing__product-name a {
  color: var(--color-text);
  text-decoration: none;
}

.pricing__product-name a:hover {
  color: var(--color-accent);
}

.pricing__price {
  font-weight: 600;
  color: var(--color-text) !important;
  white-space: nowrap;
}

.pricing__note {
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 500;
  text-align: center;
}

/* ===========================
   CONTACTS
   =========================== */
.contacts {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.contacts__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 600px) {
  .contacts__grid { grid-template-columns: 1fr 1fr; }
}

.contact-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.contact-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.contact-card__phone,
.contact-card__email {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-accent);
  text-decoration: none;
  margin-bottom: var(--space-2);
}

.contact-card__phone:hover,
.contact-card__email:hover {
  color: var(--color-accent-dim);
  text-decoration: underline;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-8);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--color-accent);
}

.footer__brand p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ===========================
   SCROLL REVEAL ANIMATIONS
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.founders__grid .founder-card.reveal:nth-child(2) { transition-delay: 0.12s; }
.contacts__grid .contact-card.reveal:nth-child(2) { transition-delay: 0.12s; }

/* ===========================
   MOBILE PRICING CARDS
   =========================== */
.pricing__cards {
  display: none;
}

@media (max-width: 767px) {
  .pricing__cards {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
  }
  .pricing__table-wrap {
    display: none;
  }
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.pricing-card__name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-accent);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: 0.04em;
}

.pricing-card__item {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid rgba(30, 58, 95, 0.4);
}

.pricing-card__item:last-child {
  border-bottom: none;
}

.pricing-card__format {
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  max-width: none;
}

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

.pricing-card__meta span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.pricing-card__price {
  font-weight: 700;
  color: var(--color-text) !important;
  font-size: var(--text-sm) !important;
  font-variant-numeric: tabular-nums;
}

/* ===========================
   SCROLL TO TOP
   =========================== */
.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 90;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-bg);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out), background 0.2s;
  box-shadow: 0 4px 16px rgba(57, 255, 20, 0.25);
}

.scroll-top--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.scroll-top:hover {
  background: var(--color-accent-dim);
}

/* ===========================
   SCROLLBAR
   =========================== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-faint); }