/* ==========================================================================
   e.Voto — Landing Page Stylesheet
   Mobile-first, design-token-driven, no external dependencies beyond
   the Google Fonts import in index.html.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Primary palette */
  --color-primary:        #1a237e;
  --color-primary-dark:   #0d1757;
  --color-primary-light:  #3949ab;
  --color-accent:         #5c6bc0;
  --color-accent-hover:   #3f51b5;

  /* Neutral palette */
  --color-bg:             #f8f9fc;
  --color-surface:        #ffffff;
  --color-text:           #1a1a2e;
  --color-text-muted:     #5a6072;
  --color-border:         #e0e4ef;

  /* Semantic */
  --color-success:        #2e7d32;
  --color-success-bg:     #e8f5e9;
  --color-error:          #c62828;
  --color-error-bg:       #ffebee;

  /* Typography */
  --font-family:          'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base:       1rem;       /* 16 px */
  --line-height-base:     1.6;

  /* Spacing scale (multiples of 4 px) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Border radius */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-card:  0 2px 16px rgba(26, 35, 126, 0.08);
  --shadow-hover: 0 8px 32px rgba(26, 35, 126, 0.16);

  /* Transitions */
  --transition: 200ms 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-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

a {
  color: var(--color-primary-light);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav__logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.nav__logo span {
  color: var(--color-accent);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 600;
  transition: background var(--transition);
}

.nav__cta:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 60%, var(--color-accent) 100%);
  color: #fff;
  padding: var(--space-24) 0 var(--space-16);
  text-align: center;
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero__badge {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero__title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.hero__subtitle {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 500;
  opacity: 0.9;
  margin-bottom: var(--space-6);
}

.hero__tagline {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  opacity: 0.75;
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.btn:active {
  transform: translateY(0);
}

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

.btn--primary:hover {
  background: var(--color-bg);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

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

.btn--accent:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(26, 35, 126, 0.4);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* --------------------------------------------------------------------------
   Features Section
   -------------------------------------------------------------------------- */
.features {
  padding: var(--space-24) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: rgba(26, 35, 126, 0.08);
  color: var(--color-primary-light);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.section-description {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.feature-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  font-size: 1.5rem;
}

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.feature-card__body {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   Coming Soon Banner
   -------------------------------------------------------------------------- */
.coming-soon {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: var(--space-16) 0;
  text-align: center;
}

.coming-soon__inner {
  max-width: 640px;
  margin-inline: auto;
}

.coming-soon__title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.coming-soon__text {
  font-size: 1.05rem;
  opacity: 0.85;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Interest Form Section
   -------------------------------------------------------------------------- */
.interest {
  padding: var(--space-24) 0;
  background: var(--color-surface);
}

.interest__card {
  max-width: 560px;
  margin-inline: auto;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-12) var(--space-8);
  box-shadow: var(--shadow-card);
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

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

.form__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.form__input {
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form__input:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(57, 73, 171, 0.12);
}

.form__input.is-invalid {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(198, 40, 40, 0.1);
}

.form__error {
  font-size: 0.8125rem;
  color: var(--color-error);
  display: none;
}

.form__error.is-visible {
  display: block;
}

.form__submit {
  width: 100%;
  padding: var(--space-4);
  font-size: 1rem;
}

/* Feedback messages */
.feedback {
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-6);
  font-size: 0.9375rem;
  font-weight: 500;
  display: none;
}

.feedback.is-visible {
  display: block;
}

.feedback--success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid #a5d6a7;
}

.feedback--error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid #ef9a9a;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.65);
  padding: var(--space-12) 0;
  text-align: center;
}

.footer__logo {
  font-size: 1.5rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.footer__tagline {
  font-size: 0.875rem;
  margin-bottom: var(--space-6);
}

.footer__copy {
  font-size: 0.8125rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  margin-top: var(--space-6);
}

/* --------------------------------------------------------------------------
   Responsive adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
  /* Keep the CTA visible on mobile but use compact sizing so it fits the nav. */
  .nav__cta {
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
  }

  .interest__card {
    padding: var(--space-8) var(--space-6);
  }

  .hero {
    padding: var(--space-16) 0 var(--space-12);
  }
}