/* ZipStor landing page — Neo-Aero theme
   Palette: deep-space blue gradient, electric blue accent, glassmorphism */

:root {
  --accent:           #4da6ff;
  --accent-dim:       rgba(77, 166, 255, 0.22);
  --accent-glow:      rgba(77, 166, 255, 0.45);
  --accent-hover:     #2a80e0;
  --glass-bg:         rgba(255, 255, 255, 0.07);
  --glass-bg-hover:   rgba(255, 255, 255, 0.11);
  --glass-border:     rgba(255, 255, 255, 0.1);
  --glass-border-lit: rgba(77, 166, 255, 0.35);
  --glass-shadow:     0 8px 32px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  --text:             #b8d0f0;
  --text-muted:       rgba(184, 208, 240, 0.45);
  --heading:          #ffffff;
  --max-width:        72rem;
  --radius:           16px;
  --radius-sm:        10px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI,
    Roboto, Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  color: var(--text);
  background-color: #070b22;
  background-image:
    radial-gradient(ellipse at 50% 0%, rgba(77, 166, 255, 0.18) 0%, transparent 55%),
    linear-gradient(165deg, #090e2a 0%, #0d1f5c 45%, #070b22 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a { color: var(--accent); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Dividers — gradient fade lines */

hr.divider {
  border: none;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--glass-border) 25%,
    rgba(77, 166, 255, 0.25) 50%,
    var(--glass-border) 75%,
    transparent 100%
  );
  width: 100%;
  margin: 2rem auto 2.5rem;
}

hr.divider-short {
  width: 25%;
  margin: 0.75rem auto 2rem;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
}

/* Layout */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 1.25rem 7rem;
}

@media (min-width: 768px) {
  .container { padding: 7rem 2.5rem 10rem; }
}

/* Hero */

.hero { position: relative; }

/* Eyebrow badge */

.eyebrow {
  text-align: center;
  margin: 0 0 1.75rem;
}

.eyebrow strong {
  display: inline-block;
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 0.45rem 1.25rem;
  border: 1px solid rgba(77, 166, 255, 0.35);
  border-radius: 100px;
  background: rgba(77, 166, 255, 0.08);
  box-shadow:
    0 0 22px rgba(77, 166, 255, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Heading */

h1 {
  font-weight: 700;
  text-align: center;
  font-size: clamp(2.1rem, 5.5vw, 3.75rem);
  line-height: 1.12;
  margin: 0 0 2rem;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #ffffff 20%, #c2deff 70%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Lead */

.lead {
  text-align: center;
  font-size: 1.1rem;
  max-width: 42rem;
  margin: 0 auto 2rem;
  color: var(--text);
  line-height: 1.7;
}

/* Signup prompt */

.signup-prompt {
  text-align: center;
  font-size: 0.95rem;
  margin: 0 auto 1rem;
  color: var(--text-muted);
}

/* Form */

.signup-form {
  max-width: 36rem;
  margin: 0 auto 3.5rem;
}

.signup-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .signup-row {
    flex-direction: row;
    align-items: stretch;
  }
}

.signup-form input[type="email"] {
  flex: 1;
  font: inherit;
  padding: 0.75rem 1rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: var(--heading);
  min-width: 0;
}

.signup-form input[type="email"]::placeholder { color: var(--text-muted); }

.signup-form input[type="email"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(77, 166, 255, 0.18);
}

.form-error {
  color: #f87171;
  font-size: 0.875rem;
  margin: 0.75rem 0 0;
  text-align: center;
}

/* Buttons */

.btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  border: 1px solid var(--glass-border-lit);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.75rem;
  cursor: pointer;
  background: rgba(77, 166, 255, 0.1);
  color: var(--accent);
  transition: all 150ms ease;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, var(--accent) 100%);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(77, 166, 255, 0.35);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: linear-gradient(135deg, #1d50c9 0%, var(--accent-hover) 100%);
  box-shadow: 0 6px 28px rgba(77, 166, 255, 0.55);
  transform: translateY(-1px);
}

/* MailerLite embed container */

.ml-embedded {
  max-width: 36rem;
  margin: 0 auto 2.5rem;
}

/* Features grid */

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 0 auto 1.5rem;
}

@media (min-width: 640px) {
  .features { grid-template-columns: 1fr 1fr; }
}

/* Feature cards — glassmorphic */

.feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.75rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
  transition: background 200ms ease, border-color 200ms ease,
              transform 200ms ease, box-shadow 200ms ease;
}

.feature:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-lit);
  transform: translateY(-3px);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.5),
    0 0 24px rgba(77, 166, 255, 0.09),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.feature img {
  width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
}

.feature p {
  margin: 0;
  font-size: 0.975rem;
  color: var(--text);
  line-height: 1.55;
}

/* Footer */

.site-footer {
  margin-top: 2.5rem;
  text-align: center;
}

.footnote {
  margin: 0 0 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.copyright {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}