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

:root {
  --color-primary: #00D4FF;
  --color-primary-end: #0088FF;
  --color-bg: #0A0A10;
  --color-bg-secondary: #0E0E18;
  --color-bg-fallback: #0C0C14;
  --color-input-bg: #12121A;
  --color-text: rgba(255, 255, 255, 0.9);
  --color-text-secondary: rgba(255, 255, 255, 0.5);
  --color-text-accent: rgba(0, 212, 255, 0.5);
  --color-border: rgba(0, 212, 255, 0.2);
  --font-stack: "SF Pro Display", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --max-content: 640px;
  --max-prose: 680px;
}

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

body {
  font-family: var(--font-stack);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  text-decoration: underline;
}

/* ===== Neural Network Background ===== */
.bg-effect {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-effect::before {
  content: "";
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(
    circle,
    rgba(0, 212, 255, 0.06) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.bg-effect::after {
  content: "";
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(0, 136, 255, 0.04) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

/* Subtle grid overlay */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
}

/* ===== Landing Page ===== */
.landing {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 24px;
  text-align: center;
}

@media (min-width: 768px) {
  .landing {
    padding: 80px 24px;
  }
}

/* Logo */
.logo-mark {
  width: 80px;
  height: auto;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .logo-mark {
    width: 120px;
    margin-bottom: 48px;
  }
}

/* Headline */
.headline {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 20px;
  max-width: var(--max-content);
}

/* Subheadline */
.subheadline {
  font-size: clamp(16px, 2.5vw, 19px);
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin-bottom: 48px;
}

/* ===== Email Form ===== */
.email-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 480px;
  margin-bottom: 32px;
}

@media (min-width: 540px) {
  .email-form {
    flex-direction: row;
    gap: 0;
  }
}

.email-input {
  flex: 1;
  padding: 14px 18px;
  font-size: 16px;
  font-family: var(--font-stack);
  color: #fff;
  background: var(--color-input-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s;
}

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

.email-input:focus {
  border-color: var(--color-primary);
}

@media (min-width: 540px) {
  .email-input {
    border-radius: 10px 0 0 10px;
    border-right: none;
  }
}

.submit-btn {
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-stack);
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-end));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s, transform 0.1s;
}

.submit-btn:hover {
  opacity: 0.9;
}

.submit-btn:active {
  transform: scale(0.98);
}

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

@media (min-width: 540px) {
  .submit-btn {
    border-radius: 0 10px 10px 0;
  }
}

/* Form states */
.form-message {
  font-size: 15px;
  margin-top: 8px;
  min-height: 24px;
}

.form-message--success {
  color: var(--color-primary);
}

.form-message--error {
  color: #ff4d6a;
}

.form-success {
  font-size: 18px;
  color: var(--color-primary);
  padding: 14px 0;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Privacy footer */
.privacy-note {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.privacy-note a {
  color: var(--color-text-accent);
}

.privacy-note a:hover {
  color: var(--color-primary);
}

/* ===== Privacy Policy Page ===== */
.privacy-page {
  position: relative;
  z-index: 1;
  max-width: var(--max-prose);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

@media (min-width: 768px) {
  .privacy-page {
    padding: 60px 24px 120px;
  }
}

.back-link {
  display: inline-block;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.privacy-page h1 {
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.privacy-page .last-updated {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 48px;
}

.privacy-page h2 {
  font-size: 22px;
  font-weight: 600;
  color: #fff;
  margin-top: 40px;
  margin-bottom: 16px;
}

.privacy-page p,
.privacy-page ul,
.privacy-page ol {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 16px;
}

.privacy-page ul,
.privacy-page ol {
  padding-left: 24px;
}

.privacy-page li {
  margin-bottom: 8px;
}

.privacy-page a {
  color: var(--color-primary);
}