/* ==========================================================
   Hidroizolacija Kalkulator – Flatsome / HydroPoly Edition
   Design: Clean, Professional, Corporate
   Matched to hydropoly.rs Flatsome theme
   ========================================================== */

/* ── Typography ── */
@import url('https://fonts.googleapis.com/css2?family=Lato:wght@400;700;900&display=swap');

:root {
  /* HydroPoly / Flatsome Colors */
  --hk-primary: #4bb6c8;
  /* Teal CTA */
  --hk-primary-hover: #3da3b4;
  --hk-primary-glow: rgba(75, 182, 200, 0.25);
  --hk-navy: #0a2540;
  /* Deep Navy */
  --hk-navy-light: #1a3a5c;

  /* Neutral Palette */
  --hk-white: #ffffff;
  --hk-bg: #f7f7f7;
  --hk-border: #e5e7eb;
  --hk-text: #333333;
  --hk-text-muted: #666666;
  --hk-error: #dc3545;

  /* Geometry */
  --hk-radius: 4px;
  /* Flatsome uses subtle rounding */
  --hk-radius-input: 4px;
  --hk-radius-btn: 99px;
  /* Pill buttons like Flatsome CTA */

  /* Motion */
  --hk-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --hk-duration: 0.35s;
}

/* ── Reset ── */
.hk-overlay,
.hk-overlay * {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  margin: 0;
  padding: 0;
}

/* ── Overlay ── */
.hk-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 37, 64, 0.7);
  /* Navy overlay */
  opacity: 0;
  visibility: hidden;
  transition: all var(--hk-duration) var(--hk-ease);
  padding: 20px;
}

.hk-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* ── Modal ── */
.hk-modal {
  position: relative;
  background: var(--hk-white);
  border-radius: var(--hk-radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  padding: 48px 40px 40px;
  font-family: 'Lato', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--hk-text);
  transform: translateY(40px);
  opacity: 0;
  transition: all var(--hk-duration) var(--hk-ease);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.hk-overlay.is-open .hk-modal {
  transform: translateY(0);
  opacity: 1;
}

/* Background Image Inside Modal */
.hk-modal::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('http://hydropoly.rs/wp-content/uploads/2024/05/najbolja-zastita-metalnog-krova-od-kise-i-sunca.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  /* Very subtle for clean readability */
  z-index: 0;
  pointer-events: none;
  border-radius: var(--hk-radius);
}

/* Ensure content is above the bg image */
.hk-modal>* {
  position: relative;
  z-index: 1;
}

/* Mobile: Fullscreen */
@media (max-width: 640px) {
  .hk-overlay {
    padding: 0;
  }

  .hk-modal {
    max-height: 100vh;
    height: 100%;
    border-radius: 0;
    padding: 60px 20px 30px;
    transform: translateY(100%);
  }

  .hk-overlay.is-open .hk-modal {
    transform: translateY(0);
  }
}

/* ── Close Button ── */
.hk-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--hk-border);
  border-radius: 50%;
  color: var(--hk-text-muted);
  font-size: 22px;
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s var(--hk-ease);
  line-height: 1;
}

.hk-close:hover {
  background: var(--hk-navy);
  border-color: var(--hk-navy);
  color: var(--hk-white);
}

/* ── Header & Progress ── */
.hk-header-meta {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 3px solid var(--hk-primary);
}

.hk-step-counter {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--hk-primary);
  margin-bottom: 10px;
}

.hk-progress-wrap {
  height: 4px;
  background: var(--hk-border);
  border-radius: 99px;
  overflow: hidden;
}

.hk-progress-bar {
  height: 100%;
  background: var(--hk-primary);
  border-radius: 99px;
  width: 0%;
  transition: width 0.6s var(--hk-ease);
}

/* ── Title ── */
.hk-modal-title {
  font-family: 'Lato', sans-serif;
  font-size: 24px;
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 32px;
  color: var(--hk-navy);
}

/* ── Form ── */
#hk-form {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.hk-step {
  display: none;
  opacity: 0;
  flex: 1;
  flex-direction: column;
}

.hk-step.active {
  display: flex;
  animation: stepFadeIn 0.4s var(--hk-ease) forwards;
}

@keyframes stepFadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Labels ── */
.hk-label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--hk-navy);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.hk-req {
  color: var(--hk-error);
}

/* ── Inputs ── */
.hk-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 15px;
  font-family: 'Lato', sans-serif;
  background: var(--hk-white);
  border: 1px solid var(--hk-border);
  border-radius: var(--hk-radius-input);
  color: var(--hk-text);
  transition: border-color 0.2s var(--hk-ease), box-shadow 0.2s var(--hk-ease);
}

.hk-input::placeholder {
  color: #999;
}

.hk-input:focus {
  outline: none;
  border-color: var(--hk-primary);
  box-shadow: 0 0 0 3px var(--hk-primary-glow);
}

/* ── Error Messages ── */
.hk-error {
  display: block;
  font-size: 13px;
  color: var(--hk-error);
  margin-top: 6px;
  min-height: 18px;
}

/* ── Radio Groups ── */
.hk-radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hk-radio-label {
  padding: 16px 18px;
  background: var(--hk-white);
  border: 1px solid var(--hk-border);
  border-radius: var(--hk-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15px;
  color: var(--hk-text);
  transition: all 0.2s var(--hk-ease);
}

.hk-radio-label:hover {
  border-color: var(--hk-primary);
  background: rgba(75, 182, 200, 0.04);
}

.hk-radio-label:has(input:checked) {
  border-color: var(--hk-primary);
  background: rgba(75, 182, 200, 0.06);
  box-shadow: 0 0 0 1px var(--hk-primary);
}

/* Custom Radio */
.hk-radio-label input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  min-width: 20px;
  border: 2px solid #ccc;
  border-radius: 50%;
  margin: 0;
  position: relative;
  cursor: pointer;
  transition: all 0.2s var(--hk-ease);
}

.hk-radio-label input[type="radio"]:checked {
  border-color: var(--hk-primary);
  background: var(--hk-primary);
}

.hk-radio-label input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: var(--hk-white);
  border-radius: 50%;
}

/* Fieldset Reset */
.hk-step fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

/* ── Navigation ── */
.hk-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 32px;
  gap: 12px;
}

.hk-btn {
  padding: 14px 32px;
  font-size: 14px;
  font-weight: 700;
  font-family: 'Lato', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--hk-radius-btn);
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s var(--hk-ease);
}

/* Ensure hidden attribute works even with display:flex */
.hk-btn[hidden] {
  display: none !important;
}

.hk-btn-prev {
  background: transparent;
  color: var(--hk-text-muted);
  border: 1px solid var(--hk-border);
}

.hk-btn-prev:hover {
  background: var(--hk-bg);
  border-color: #ccc;
}

.hk-btn-next {
  background: var(--hk-navy);
  color: var(--hk-white);
  margin-left: auto;
}

.hk-btn-next:hover {
  background: var(--hk-navy-light);
}

.hk-btn-submit {
  background: var(--hk-primary);
  color: var(--hk-white);
  margin-left: auto;
}

.hk-btn-submit:hover {
  background: var(--hk-primary-hover);
}

/* ── Mobile Nav ── */
@media (max-width: 640px) {
  .hk-btn {
    width: 100%;
    justify-content: center;
    padding: 16px;
  }

  .hk-nav {
    flex-direction: column-reverse;
    padding-top: 24px;
  }

  .hk-modal-title {
    font-size: 20px;
    margin-bottom: 24px;
  }

  .hk-label {
    font-size: 13px;
  }
}

/* ── Success State ── */
.hk-success {
  text-align: center;
  padding: 40px 0;
}

.hk-success-icon {
  width: 80px;
  height: 80px;
  background: var(--hk-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 36px;
  color: var(--hk-white);
  animation: successPop 0.5s var(--hk-ease) forwards;
}

@keyframes successPop {
  from {
    transform: scale(0);
    opacity: 0;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

.hk-success p {
  font-size: 16px;
  color: var(--hk-text);
  line-height: 1.6;
}

/* ── Scrollbar ── */
.hk-modal::-webkit-scrollbar {
  width: 4px;
}

.hk-modal::-webkit-scrollbar-track {
  background: transparent;
}

.hk-modal::-webkit-scrollbar-thumb {
  background: var(--hk-border);
  border-radius: 99px;
}

/* ── Trigger Button ── */
a.open-hidro-popup,
button.open-hidro-popup {
  display: inline-block;
  background: #4bb6c8;
  color: #ffffff !important;
  padding: 12px 28px;
  border-radius: 99px;
  font-family: 'Lato', sans-serif;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}

a.open-hidro-popup:hover,
button.open-hidro-popup:hover {
  background: #3da3b4;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(75, 182, 200, 0.35);
}