/* ==========================================================================
   Case Study Password Gate — Don Polistico Portfolio
   Minimal, restrained gate for in-progress case study pages.
   ========================================================================== */

/* FOUC prevention & lock toggle */
html.cs-locked {
  overflow: hidden !important;
  height: 100% !important;
}

html.cs-locked body {
  overflow: hidden !important;
  height: 100% !important;
}

html.cs-locked body > *:not(#cs-gate) {
  display: none !important;
}

#cs-gate {
  display: none;
}

html.cs-locked #cs-gate {
  display: flex !important;
}

/* Gate Layout */
.cs-gate {
  position: fixed;
  inset: 0;
  z-index: 99999;
  width: 100%;
  min-height: 100dvh;
  background: #0f1115;
  color: #f7f7f5;
  font-family: 'Lexend Deca', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: max(24px, env(safe-area-inset-top)) max(24px, env(safe-area-inset-right)) max(28px, env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left));
  box-sizing: border-box;
  opacity: 1;
  transition: opacity 0.24s ease, visibility 0.24s ease;
}

.cs-gate.cs-gate-unlocking {
  opacity: 0;
  pointer-events: none;
}

/* Top Nav */
.cs-gate-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

.cs-gate-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  padding: 8px 0;
  min-height: 44px;
  touch-action: manipulation;
  transition: color 0.15s ease;
}

.cs-gate-back svg {
  width: 14px;
  height: 14px;
  transition: transform 0.15s ease;
}

@media (hover: hover) {
  .cs-gate-back:hover {
    color: #ffffff;
  }
  .cs-gate-back:hover svg {
    transform: translateX(-3px);
  }
}

.cs-gate-back:focus-visible {
  outline: none;
  color: #ffffff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35);
  border-radius: 4px;
}

.cs-gate-back:active {
  color: rgba(255, 255, 255, 0.8);
}

/* Center Card / Content */
.cs-gate-center {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 40px 0;
}

.cs-gate-card {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  text-align: left;
}

.cs-gate-title {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: #ffffff;
  margin: 0 0 18px;
}

/* Form & Input */
.cs-gate-form {
  position: relative;
  width: 100%;
  margin: 0;
}

.cs-gate-input-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
  width: 100%;
}

.cs-gate-input {
  flex: 1;
  min-height: 46px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 16px; /* 16px prevents iOS Safari auto-zoom */
  color: #ffffff;
  background: #141820;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
  touch-action: manipulation;
}

.cs-gate-input::placeholder {
  color: rgba(255, 255, 255, 0.32);
}

.cs-gate-input:focus {
  border-color: rgba(255, 255, 255, 0.45);
  background: #171c26;
}

.cs-gate-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  min-width: 46px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: #0f1115;
  background: #f2efe9;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 0.15s ease, transform 0.1s ease;
}

.cs-gate-btn svg {
  width: 14px;
  height: 14px;
  transition: transform 0.15s ease;
}

@media (hover: hover) {
  .cs-gate-btn:hover {
    background: #ffffff;
  }
  .cs-gate-btn:hover svg {
    transform: translateX(2px);
  }
}

.cs-gate-btn:active {
  transform: scale(0.98);
  background: #e5e1d8;
}

.cs-gate-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.5);
}

/* Error message & shake */
.cs-gate-error {
  min-height: 20px;
  margin: 10px 0 0;
  font-size: 12px;
  font-weight: 500;
  color: #e06c52; /* desaturated terracotta */
  letter-spacing: 0.01em;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.cs-gate-error.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.cs-gate-input.is-error {
  border-color: #e06c52 !important;
}

@keyframes csGateShake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.cs-gate-shake {
  animation: csGateShake 0.35s ease;
}

@media (prefers-reduced-motion: reduce) {
  .cs-gate-shake {
    animation: none !important;
  }
  .cs-gate,
  .cs-gate-btn,
  .cs-gate-btn svg,
  .cs-gate-back svg {
    transition: none !important;
  }
}

/* Footer info */
.cs-gate-footer {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  font-size: 12px;
}

.cs-gate-footer a {
  color: rgba(255, 255, 255, 0.38);
  text-decoration: none;
  transition: color 0.15s ease;
}

@media (hover: hover) {
  .cs-gate-footer a:hover {
    color: rgba(255, 255, 255, 0.75);
  }
}

.cs-gate-footer a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35);
  border-radius: 2px;
}

/* Discreet lock button when page is unlocked */
.nav-lock-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.45);
  padding: 4px 8px;
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  touch-action: manipulation;
  min-height: 28px;
  gap: 5px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

@media (hover: hover) {
  .nav-lock-btn:hover {
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.35);
  }
}

.nav-lock-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35);
}

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