/* ============================================================
   Security Tech Labs — Conference Slideshow
   Dark-only presentation mode
   ============================================================ */

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

:root {
  /* Palette — deep navy tech aesthetic */
  --bg:           #060b18;
  --bg-surface:   #0c1225;
  --bg-card:      #111a32;
  --accent:       #3b82f6;
  --accent-dim:   rgba(59, 130, 246, 0.12);
  --accent-glow:  rgba(59, 130, 246, 0.25);
  --accent-2:     #6366f1;
  --accent-3:     #8b5cf6;
  --text:         #f1f5f9;
  --text-muted:   #94a3b8;
  --text-faint:   rgba(255,255,255, 0.18);
  --border:       rgba(255,255,255, 0.06);
  --border-accent: rgba(59, 130, 246, 0.18);

  /* Type */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  /* Easing */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  font-family: var(--font-body);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: none;
}


/* ============================================================
   Loading Overlay
   ============================================================ */
.loader-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  transition: opacity 0.6s var(--ease);
}
.loader-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.loader-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}
.loader-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--accent-dim);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loader-text {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}


/* ============================================================
   Slideshow Container
   ============================================================ */
#slideshow {
  position: relative;
  width: 100vw;
  height: 100vh;
}


/* ============================================================
   Slide Base
   ============================================================ */
.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.9s var(--ease), visibility 0s 0.9s;
  z-index: 1;
}
.slide.active {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.9s var(--ease), visibility 0s 0s;
  z-index: 2;
}


/* ============================================================
   Intro Slide
   ============================================================ */
.slide--intro {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

/* Animated background */
.intro-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.intro-bg__grid {
  position: absolute;
  inset: -10%;
  background-image:
    linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  transform: perspective(600px) rotateX(35deg);
  transform-origin: center 60%;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
}

.intro-bg__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.5;
  animation: float 18s ease-in-out infinite alternate;
}
.intro-bg__glow--1 {
  width: 500px; height: 500px;
  background: rgba(59,130,246,0.1);
  top: -10%; left: 10%;
}
.intro-bg__glow--2 {
  width: 400px; height: 400px;
  background: rgba(99,102,241,0.08);
  bottom: -5%; right: 15%;
  animation-delay: -6s;
}
.intro-bg__glow--3 {
  width: 300px; height: 300px;
  background: rgba(139,92,246,0.06);
  top: 40%; right: -5%;
  animation-delay: -12s;
}

@keyframes float {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -20px) scale(1.05); }
  100% { transform: translate(-20px, 15px) scale(0.95); }
}

/* Intro content */
.intro-content {
  position: relative;
  z-index: 2;
  max-width: 1140px;
  width: 100%;
  padding: 48px 80px;
  text-align: center;
}

/* Badge */
.intro-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 20px 7px 16px;
  border-radius: var(--radius-full);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(#ffffff);
  margin-bottom: var(--space-10);
}
.intro-badge__icon {
  flex-shrink: 0;
}

/* Title */
.intro-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 3.4vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: var(--space-8);
}
.intro-title__accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Divider */
.intro-divider {
  width: 56px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px;
  margin: 0 auto var(--space-8);
}

/* Body */
.intro-body {
  font-size: clamp(17px, 1.4vw, 22px);
  line-height: 1.7;
  color: var(--text-muted);
  font-weight: 400;
  max-width: 880px;
  margin: 0 auto var(--space-10);
}
.intro-body p {
  margin-bottom: var(--space-4);
  text-align: left;
}
.intro-body p:last-child {
  margin-bottom: 0;
}

/* Service bullets */
.intro-services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 820px;
  margin: 0 auto;
}

.service-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255, 0.025);
  border: 1px solid var(--border);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  text-align: left;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.service-item__icon {
  flex-shrink: 0;
  color: var(--accent);
  opacity: 0.7;
}


/* ============================================================
   Website Slide
   ============================================================ */
.slide--web {
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

/* Header bar */
.web-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 32px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 10;
}

.web-header__left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.web-header__dots {
  display: flex;
  gap: 7px;
}
.web-header__dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255,255,255, 0.08);
}
.web-header__dot--red   { background: #ff5f57; }
.web-header__dot--yellow { background: #ffbd2e; }
.web-header__dot--green  { background: #28c840; }

.web-header__url-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255, 0.04);
  border: 1px solid var(--border);
  min-width: 380px;
}

.web-header__lock {
  width: 13px;
  height: 13px;
  color: #28c840;
  flex-shrink: 0;
}

.web-header__url {
  font-size: 13px;
  font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
  color: var(--text-muted);
  font-weight: 400;
}

.web-header__right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.web-header__project-name {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

.web-header__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.web-header__brand-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* iframe container */
.web-iframe-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.web-iframe-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  background: #ffffff;
}


/* ============================================================
   Progress Bar
   ============================================================ */
.progress-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  z-index: 500;
  box-shadow: 0 0 14px var(--accent-glow);
  will-change: width;
}


/* ============================================================
   Slide Counter
   ============================================================ */
.slide-counter {
  position: fixed;
  bottom: 14px;
  right: 24px;
  z-index: 500;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}


/* ============================================================
   Persistent Footer
   ============================================================ */
.persistent-footer {
  position: fixed;
  bottom: 12px;
  left: 24px;
  z-index: 500;
}
.persistent-footer__pplx {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-faint);
  text-decoration: none;
  letter-spacing: 0.04em;
}