/* Aria Assistant - Main Stylesheet */

:root {
  --color-primary: #2B2B43;
  --color-primary-light: #3D3D5C;
  --color-secondary: #6B5B95;
  --color-accent: #88D8B0;
  --color-accent-dark: #5FBDA0;
  --color-text: #1A1A2E;
  --color-text-muted: #6B7280;
  --color-bg: #FAFAFA;
  --color-bg-alt: #F3F4F6;
  --color-bg-dark: #1A1A2E;
  --color-white: #FFFFFF;
  --color-border: #E5E7EB;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --text-xs: 0.75rem; --text-sm: 0.875rem; --text-base: 1rem;
  --text-lg: 1.125rem; --text-xl: 1.25rem; --text-2xl: 1.5rem;
  --text-3xl: 1.875rem; --text-4xl: 2.25rem; --text-5xl: 3rem;
  --space-xs: 0.5rem; --space-sm: 1rem; --space-md: 1.5rem;
  --space-lg: 2rem; --space-xl: 3rem; --space-2xl: 4rem;
  --space-3xl: 6rem; --space-4xl: 8rem;
  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem;
  --radius-xl: 1rem; --radius-2xl: 1.5rem; --radius-full: 9999px;
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  --transition-fast: 150ms ease; --transition-base: 200ms ease;
  --container-max: 1200px; --container-padding: 1.5rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-body); font-size: var(--text-base); line-height: 1.6; color: var(--color-text); background: var(--color-bg); -webkit-font-smoothing: antialiased; }
img, video, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.2; color: var(--color-primary); }
h1 { font-size: var(--text-5xl); } h2 { font-size: var(--text-4xl); } h3 { font-size: var(--text-3xl); }
p { margin-bottom: var(--space-md); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }
.section { padding: var(--space-4xl) 0; }
.section--dark { background: var(--color-bg-dark); color: var(--color-white); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--color-white); }
.section--alt { background: var(--color-bg-alt); }

/* Navigation */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--color-border); }
.nav__container { display: flex; align-items: center; justify-content: space-between; padding: var(--space-sm) var(--container-padding); max-width: var(--container-max); margin: 0 auto; }
.nav__logo { display: flex; align-items: center; gap: var(--space-xs); font-weight: 600; font-size: var(--text-xl); color: var(--color-primary); }
.nav__logo img { width: 40px; height: 40px; border-radius: var(--radius-md); }
.nav__links { display: flex; align-items: center; gap: var(--space-lg); }
.nav__link { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); transition: color var(--transition-fast); }
.nav__link:hover { color: var(--color-primary); }
.nav__cta { display: inline-flex; align-items: center; gap: var(--space-xs); padding: var(--space-xs) var(--space-md); background: var(--color-primary); color: var(--color-white); border-radius: var(--radius-full); font-size: var(--text-sm); font-weight: 500; }
.nav__cta:hover { background: var(--color-primary-light); }
.nav__toggle { display: none; flex-direction: column; gap: 4px; padding: var(--space-xs); background: none; border: none; cursor: pointer; }
.nav__toggle span { display: block; width: 24px; height: 2px; background: var(--color-primary); }
@media (max-width: 768px) {
  .nav__toggle { display: flex; }
  .nav__links { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; padding: var(--space-lg); background: var(--color-white); border-bottom: 1px solid var(--color-border); }
  .nav__links.active { display: flex; }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); padding: var(--space-sm) var(--space-lg); font-size: var(--text-base); font-weight: 500; border-radius: var(--radius-lg); border: none; cursor: pointer; transition: all var(--transition-fast); }
.btn--primary { background: var(--color-primary); color: var(--color-white); }
.btn--primary:hover { background: var(--color-primary-light); transform: translateY(-1px); }
.btn--secondary { background: var(--color-white); color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn--accent { background: var(--color-accent); color: var(--color-primary); }
.btn--large { padding: var(--space-md) var(--space-xl); font-size: var(--text-lg); }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: 80px; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%); overflow: hidden; }
.hero__content { position: relative; z-index: 1; max-width: 600px; }
.hero__badge { display: inline-block; padding: var(--space-xs) var(--space-sm); background: rgba(255,255,255,0.15); border-radius: var(--radius-full); font-size: var(--text-sm); color: var(--color-white); margin-bottom: var(--space-md); }
.hero h1 { font-size: clamp(2.5rem, 5vw, 4rem); color: var(--color-white); margin-bottom: var(--space-md); }
.hero__subtitle { font-size: var(--text-xl); color: rgba(255,255,255,0.9); margin-bottom: var(--space-xl); line-height: 1.6; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: center; }
.hero__device { position: absolute; right: 5%; top: 50%; transform: translateY(-50%); max-width: 350px; z-index: 1; }
@media (max-width: 1024px) { .hero__device { display: none; } }
.app-store-badge { height: 50px; transition: transform var(--transition-fast); }
.app-store-badge:hover { transform: scale(1.05); }

/* Cards */
.card { background: var(--color-white); border-radius: var(--radius-xl); padding: var(--space-xl); box-shadow: var(--shadow-md); transition: all var(--transition-base); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.card__icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%); border-radius: var(--radius-lg); margin-bottom: var(--space-md); font-size: var(--text-2xl); }
.card__title { font-size: var(--text-xl); margin-bottom: var(--space-sm); }
.card__text { color: var(--color-text-muted); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-lg); }

/* Section Headers */
.section-header { text-align: center; max-width: 700px; margin: 0 auto var(--space-3xl); }
.section-header h2 { margin-bottom: var(--space-md); }
.section-header p { font-size: var(--text-lg); color: var(--color-text-muted); }

/* Comparison */
.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); max-width: 900px; margin: 0 auto; }
@media (max-width: 768px) { .comparison { grid-template-columns: 1fr; } }
.comparison__item { padding: var(--space-xl); border-radius: var(--radius-xl); text-align: center; }
.comparison__item--generic { background: var(--color-bg-alt); border: 2px dashed var(--color-border); }
.comparison__item--aria { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%); color: var(--color-white); }
.comparison__label { font-size: var(--text-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-md); opacity: 0.7; }
.comparison__quote { font-size: var(--text-xl); font-style: italic; line-height: 1.5; }

/* Privacy Stats */
.privacy-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); margin-top: var(--space-xl); }
@media (max-width: 768px) { .privacy-stats { grid-template-columns: 1fr; } }
.privacy-stat { text-align: center; padding: var(--space-lg); }
.privacy-stat__number { font-size: var(--text-5xl); font-weight: 700; color: var(--color-accent); line-height: 1; }
.privacy-stat__label { font-size: var(--text-base); color: rgba(255,255,255,0.8); margin-top: var(--space-sm); }
.privacy-quote { max-width: 700px; margin: var(--space-3xl) auto 0; padding: var(--space-xl); border-left: 4px solid var(--color-accent); font-size: var(--text-xl); font-style: italic; color: rgba(255,255,255,0.9); }

/* Devices */
.devices { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-xl); margin-top: var(--space-xl); }
.device { text-align: center; padding: var(--space-lg); }
.device__icon { font-size: 4rem; margin-bottom: var(--space-sm); }
.device__name { font-weight: 600; color: var(--color-primary); }

/* CTA Section */
.cta-section { text-align: center; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%); padding: var(--space-4xl) var(--container-padding); }
.cta-section h2 { color: var(--color-white); margin-bottom: var(--space-md); }
.cta-section p { color: rgba(255,255,255,0.9); font-size: var(--text-lg); max-width: 600px; margin: 0 auto var(--space-xl); }
.email-signup { max-width: 500px; margin: var(--space-xl) auto 0; }
.email-signup__form { display: flex; gap: var(--space-sm); }
.email-signup__input { flex: 1; padding: var(--space-sm) var(--space-md); border: 2px solid rgba(255,255,255,0.3); border-radius: var(--radius-lg); background: rgba(255,255,255,0.1); color: var(--color-white); font-size: var(--text-base); }
.email-signup__input::placeholder { color: rgba(255,255,255,0.6); }
.email-signup__input:focus { outline: none; border-color: var(--color-accent); }
.email-signup__btn { padding: var(--space-sm) var(--space-lg); background: var(--color-accent); color: var(--color-primary); border: none; border-radius: var(--radius-lg); font-weight: 600; cursor: pointer; }
.email-signup__btn:hover { background: var(--color-accent-dark); }
.email-signup__note { font-size: var(--text-sm); color: rgba(255,255,255,0.7); margin-top: var(--space-sm); }
@media (max-width: 480px) { .email-signup__form { flex-direction: column; } }

/* Footer */
.footer { background: var(--color-bg-dark); color: rgba(255,255,255,0.8); padding: var(--space-3xl) 0 var(--space-lg); }
.footer__grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: var(--space-xl); margin-bottom: var(--space-xl); }
@media (max-width: 768px) { .footer__grid { grid-template-columns: 1fr; text-align: center; } }
.footer__brand { max-width: 300px; }
@media (max-width: 768px) { .footer__brand { max-width: none; margin: 0 auto; } }
.footer__logo { display: flex; align-items: center; gap: var(--space-xs); font-size: var(--text-xl); font-weight: 600; color: var(--color-white); margin-bottom: var(--space-md); }
@media (max-width: 768px) { .footer__logo { justify-content: center; } }
.footer__logo img { width: 40px; height: 40px; border-radius: var(--radius-md); }
.footer__tagline { font-size: var(--text-sm); line-height: 1.6; }
.footer__heading { font-size: var(--text-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-white); margin-bottom: var(--space-md); }
.footer__links { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer__link { font-size: var(--text-sm); color: rgba(255,255,255,0.7); transition: color var(--transition-fast); }
.footer__link:hover { color: var(--color-accent); }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--space-lg); border-top: 1px solid rgba(255,255,255,0.1); font-size: var(--text-sm); }
@media (max-width: 768px) { .footer__bottom { flex-direction: column; gap: var(--space-md); text-align: center; } }
.footer__social { display: flex; gap: var(--space-md); }
.footer__social a:hover { color: var(--color-accent); }

/* Video Section */
.video-section { background: var(--color-bg-alt); }
.video-placeholder { position: relative; max-width: 800px; margin: 0 auto; aspect-ratio: 16/9; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%); border-radius: var(--radius-2xl); display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--color-white); }
.video-placeholder__play { width: 80px; height: 80px; display: flex; align-items: center; justify-content: center; background: rgba(255,255,255,0.2); border-radius: 50%; font-size: 2rem; margin-bottom: var(--space-md); }
.video-placeholder__text { font-size: var(--text-lg); opacity: 0.9; }

/* Pendant Section */
.pendant__content { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3xl); align-items: center; }
@media (max-width: 768px) { .pendant__content { grid-template-columns: 1fr; text-align: center; } }
.pendant__image { display: flex; justify-content: center; }
.pendant__image img { max-width: 300px; border-radius: var(--radius-2xl); }
.pendant__badge { display: inline-block; padding: var(--space-xs) var(--space-sm); background: var(--color-accent); color: var(--color-primary); border-radius: var(--radius-full); font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-md); }

/* Pillars */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); margin-top: var(--space-xl); }
@media (max-width: 768px) { .pillars { grid-template-columns: 1fr; } }
.pillar { text-align: center; padding: var(--space-xl); }
.pillar__icon { font-size: 3rem; margin-bottom: var(--space-md); }
.pillar__title { font-size: var(--text-xl); font-weight: 600; color: var(--color-primary); margin-bottom: var(--space-sm); }
.pillar__text { color: var(--color-text-muted); }

/* Utilities */
.skip-link { position: absolute; top: -40px; left: 0; background: var(--color-primary); color: var(--color-white); padding: var(--space-sm); z-index: 9999; }
.skip-link:focus { top: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* Feature Row - Responsive */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.feature-row--reverse {
  direction: rtl;
}

.feature-row--reverse > * {
  direction: ltr;
}

.feature-visual {
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
}

@media (max-width: 768px) {
  .feature-row {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .feature-row--reverse {
    direction: ltr;
  }
  
  .feature-visual {
    min-height: 200px;
    font-size: 3rem;
    order: -1;
  }
}