/* ============================================================
   LASTROOM – style-base.css
   Design System · Reset · Typography · Layout · Utilities
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Syne:wght@700;800&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* Brand */
  --c-primary: #00BFCF;
  --c-primary-deep: #0097A7;
  --c-primary-dark: #004F59;
  --c-primary-light: #E6FAFC;
  --c-primary-glow: rgba(0, 191, 207, 0.35);

  /* Neutrals */
  --c-white: #FFFFFF;
  --c-bg: #F7FAFB;
  --c-text: #1A1A1A;
  --c-text-sec: #5F6B6D;
  --c-border: #E0E7E9;
  --c-card-bg: #FFFFFF;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, .08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, .12);
  --shadow-glow: 0 0 40px var(--c-primary-glow);

  /* Radii */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;
  --r-full: 9999px;

  /* Spacing scale (4px based) */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;
  --sp-24: 96px;

  /* Typography */
  --ff: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ff-display: 'Syne', 'Inter', sans-serif;
  --fs-xs: .75rem;
  /* 12 */
  --fs-sm: .875rem;
  /* 14 */
  --fs-base: 1rem;
  /* 16 */
  --fs-md: 1.125rem;
  /* 18 */
  --fs-lg: 1.25rem;
  /* 20 */
  --fs-xl: 1.5rem;
  /* 24 */
  --fs-2xl: 2rem;
  /* 32 */
  --fs-3xl: 2.5rem;
  /* 40 */
  --fs-4xl: 3.25rem;
  /* 52 */
  --fs-hero: 4rem;
  /* 64 */

  /* Transitions */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --dur: .35s;

  /* Header */
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

body {
  font-family: var(--ff);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
}

ul,
ol {
  list-style: none;
}

input,
textarea {
  font: inherit;
  border: none;
  outline: none;
  background: none;
}

/* ---------- Selection ---------- */
::selection {
  background: var(--c-primary-light);
  color: var(--c-primary-dark);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--c-primary);
  border-radius: var(--r-full);
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--fs-hero);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: var(--fs-3xl);
}

h3 {
  font-size: var(--fs-xl);
}

p {
  font-size: var(--fs-md);
  color: var(--c-text-sec);
  line-height: 1.7;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.section-padding {
  padding: var(--sp-24) 0;
}

@media(max-width: 768px) {
    .section-padding {
        padding: var(--sp-12) 0;
    }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-weight: 600;
  font-size: var(--fs-base);
  padding: var(--sp-3) var(--sp-8);
  border-radius: var(--r-full);
  transition: all var(--dur) var(--ease);
  position: relative;
  overflow: hidden;
}

/* Shimmer sweep on hover */
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, .35), transparent);
  transform: skewX(-20deg);
  transition: left .6s var(--ease);
}

.btn:hover::before {
  left: 130%;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, .08);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-deep));
  color: var(--c-white);
  box-shadow: var(--shadow-sm), 0 4px 20px var(--c-primary-glow);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-md), 0 12px 40px var(--c-primary-glow);
}

.btn-primary:active {
  transform: translateY(-1px) scale(1);
}

.btn-secondary {
  background: var(--c-white);
  color: var(--c-primary-deep);
  border: 2px solid var(--c-border);
}

.btn-secondary:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: var(--sp-4) var(--sp-10);
  font-size: var(--fs-lg);
}

/* ---------- Scroll Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(48px);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-48px);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}

.reveal-right {
  opacity: 0;
  transform: translateX(48px);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}

.reveal-scale {
  opacity: 0;
  transform: scale(.88);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}

.reveal-left.visible,
.reveal-right.visible,
.reveal-scale.visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 {
  transition-delay: .1s;
}

.reveal-delay-2 {
  transition-delay: .2s;
}

.reveal-delay-3 {
  transition-delay: .3s;
}

.reveal-delay-4 {
  transition-delay: .4s;
}

.reveal-delay-5 {
  transition-delay: .5s;
}

/* ---------- Text Gradient ---------- */
.text-gradient {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-deep) 60%, var(--c-primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Glow Ring ---------- */
.glow-ring {
  outline: none;
}

.glow-ring:focus-visible {
  box-shadow: 0 0 0 3px var(--c-white), 0 0 0 5px var(--c-primary);
}

/* ---------- Floating Card Wrapper ---------- */
.float-card {
  animation: floatUpDown 4s var(--ease) infinite alternate;
}

@keyframes floatUpDown {
  0% {
    transform: translateY(0);
  }

  100% {
    transform: translateY(-10px);
  }
}

/* ---------- Shimmer Skeleton (loading) ---------- */
@keyframes shimmer {
  0% {
    background-position: -400px 0;
  }

  100% {
    background-position: 400px 0;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  h1 {
    font-size: var(--fs-3xl);
  }

  h2 {
    font-size: var(--fs-2xl);
  }

  .section-padding {
    padding: var(--sp-16) 0;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: var(--fs-2xl);
  }

  h2 {
    font-size: var(--fs-xl);
  }

  :root {
    --header-h: 60px;
  }

  .container {
    padding: 0 var(--sp-4);
  }

  .section-padding {
    padding: var(--sp-12) 0;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: var(--fs-xl);
  }

  .btn-lg {
    padding: var(--sp-3) var(--sp-6);
    font-size: var(--fs-base);
  }
}

/* ==========================================================================
   Airbnb-style Sub-Header Navigation
   ========================================================================== */
.sub-header-bar {
    position: fixed;
    top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
    left: 0;
    right: 0;
    height: 75px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, .05);
    z-index: 19999;
    display: flex;
    align-items: center;
    transition: all var(--dur) var(--ease);
}

.site-header.scrolled + .sub-header-bar,
.site-header.is-scrolled + .sub-header-bar {
    top: calc(56px + env(safe-area-inset-top, 0px));
}

.sub-header-inner {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

.sub-header-scroll-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

.sub-header-scroll-wrapper::-webkit-scrollbar {
    display: none;
}

.sub-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    position: relative;
    padding: 8px 0 10px 0;
    cursor: pointer;
    transition: all var(--dur) var(--ease);
}

.sub-nav-icon {
    position: relative;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
}

.svg-3d {
    width: 100%;
    height: 100%;
    transition: transform var(--dur) var(--ease-spring);
}

.sub-nav-item:hover .svg-3d {
    transform: scale(1.18) translateY(-2px);
}

.sub-nav-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--c-text-sec);
    transition: color var(--dur) var(--ease);
}

.sub-nav-item:hover .sub-nav-label {
    color: var(--c-primary);
}

/* Active bottom indicator */
.sub-nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--c-primary);
    transform: scaleX(0);
    border-radius: var(--r-full);
    transition: transform var(--dur) var(--ease-spring);
}

.sub-nav-item.active::after {
    transform: scaleX(1);
}

.sub-nav-item.active .sub-nav-label {
    color: var(--c-primary);
}

/* Red tag for novità */
.new-badge {
    position: absolute;
    top: -4px;
    right: -24px;
    background: #E6FAFC;
    color: var(--c-primary-deep);
    font-size: 0.58rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: var(--r-full);
    letter-spacing: 0.5px;
    box-shadow: 0 2px 6px rgba(0, 191, 207, 0.15);
    border: 1px solid rgba(0, 191, 207, 0.2);
}

/* --- Layout shift to accommodate sub-header height (75px) --- */
#hero,
.explore-main,
.reels-body,
.privacy-body .site-header + *,
.terms-body .site-header + *,
.activity-body .site-header + *,
.structure-body .site-header + * {
    margin-top: 147px !important;
}

/* Special cases for specific landing pages */
.explore-intro {
    padding-top: 30px !important; /* original was 94px, now shifted by margin-top */
}

@media (max-width: 768px) {
    .sub-header-bar {
        top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
        height: 70px;
    }

    .sub-header-scroll-wrapper {
        justify-content: center;
        gap: 32px;
        padding: 0 var(--sp-2);
    }

    .sub-nav-item {
        flex-shrink: 0;
    }

    #hero,
    .explore-main,
    .reels-body,
    .privacy-body .site-header + *,
    .terms-body .site-header + *,
    .activity-body .site-header + *,
    .structure-body .site-header + * {
        margin-top: 130px !important;
    }
}

/* ==========================================================================
   Asynchronous Validation Loading Spinner
   ========================================================================== */
.loading-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    border-top-color: #ffffff;
    animation: spinnerSpin 0.7s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

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

/* User Dashboard Home view shifts for sub-header spacing */
.user-area-view-home .user-area-main {
    margin-top: 75px !important;
}

/* Optimize index page desktop spacing to fit entire hero section in viewport without scroll */
#hero {
    min-height: auto !important;
    height: auto !important;
    padding-top: 0px !important;
    padding-bottom: 40px !important;
    align-items: flex-start !important;
}
.hero-content {
    padding-top: 20px !important;
}

@media (max-width: 768px) {
    .user-area-view-home .user-area-main {
        margin-top: 70px !important;
    }
    
    #hero {
        min-height: auto !important;
        height: auto !important;
        padding-top: 0px !important;
        padding-bottom: 20px !important;
        align-items: flex-start !important;
    }
    .hero-content {
        padding-top: 15px !important;
    }
}

/* Scaled-down novelty badge for a clean micro-ui look */
.new-badge-mini {
    top: -2px !important;
    right: -18px !important;
    font-size: 0.5rem !important;
    padding: 1px 4px !important;
    letter-spacing: 0.2px !important;
}