/* ============================================================
   UEMS Product Roadmap — styles.css
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors */
  --color-primary-blue: #0085ff;
  --color-primary-blue-hover: #006fd6;
  --color-cta-red: #e9142b;
  --color-dark-bg: #222326;
  --color-white: #ffffff;
  --color-black: #000000;
  --color-text-gray: #666666;
  --color-text-light: #888888;
  --color-border-light: #e2e6ea;
  --color-border-blue: #bcddff;
  --color-bg-light-blue: #f3f9ff;
  --color-bg-hero: #f4f9ff;
  --color-bg-gray: #f7f7f7;
  --color-bg-page: #f5f6f8;

  /* Status colors */
  --status-released: #0d9b52;
  --status-released-bg: #e8f8ef;
  --status-early-access: #e68a00;
  --status-early-access-bg: #fff6e5;
  --status-upcoming: #7c5cfc;
  --status-upcoming-bg: #f0ecff;

  /* Font family */
  --font-family: 'Zoho Puvi', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;

  /* Font sizes */
  --fs-xs: 12px;
  --fs-sm: 14px;
  --fs-base: 15px;
  --fs-md: 16px;
  --fs-lg: 18px;
  --fs-xl: 22px;
  --fs-2xl: 32px;
  --fs-3xl: 40px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Container */
  --container-max: 1200px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 50px;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-dropdown: 0 4px 12px rgba(0,0,0,0.1);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--fs-base);
  color: var(--color-black);
  background: var(--color-bg-page);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

ul, ol {
  list-style: none;
}

button, select {
  font-family: var(--font-family);
  cursor: pointer;
}

/* ---------- Utility ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

/* ---------- HEADER ---------- */
.roadmap-header {
  background: linear-gradient(135deg, #0a1628 0%, #1a2d4a 50%, #0f2240 100%);
  padding: 60px 0 56px;
  position: relative;
  overflow: hidden;
}

.roadmap-header::before {
  content: '';
  position: absolute;
  top: -40%;
  left: -10%;
  width: 60%;
  height: 180%;
  background: radial-gradient(ellipse at center, rgba(0,133,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.roadmap-header::after {
  content: '';
  position: absolute;
  bottom: -40%;
  right: -10%;
  width: 50%;
  height: 160%;
  background: radial-gradient(ellipse at center, rgba(124,92,252,0.08) 0%, transparent 65%);
  pointer-events: none;
}

.roadmap-header__title {
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: 12px;
  position: relative;
}

.roadmap-header__subtitle {
  font-size: var(--fs-lg);
  font-weight: 400;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  max-width: 640px;
  position: relative;
}

/* ---------- STATUS TABS ---------- */
.status-tabs {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

.status-tabs__list {
  display: flex;
  gap: 0;
}

.status-tabs__list li {
  flex: none;
}

.status-tab {
  position: relative;
  background: none;
  border: none;
  padding: 16px 28px;
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--color-text-gray);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.status-tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: transparent;
  transition: background var(--transition-fast);
}

.status-tab:hover {
  color: var(--color-black);
}

.status-tab.active {
  color: var(--color-primary-blue);
  font-weight: 600;
}

.status-tab.active::after {
  background: var(--color-primary-blue);
}

/* Tab-specific active colors */
.status-tab[data-status="released"].active {
  color: var(--status-released);
}
.status-tab[data-status="released"].active::after {
  background: var(--status-released);
}

.status-tab[data-status="early-access"].active {
  color: var(--status-early-access);
}
.status-tab[data-status="early-access"].active::after {
  background: var(--status-early-access);
}

.status-tab[data-status="upcoming"].active {
  color: var(--status-upcoming);
}
.status-tab[data-status="upcoming"].active::after {
  background: var(--status-upcoming);
}

/* ---------- FILTERS ---------- */
.filters {
  background: var(--color-white);
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.filters__bar {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 190px;
}

.filter-group label {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-text-gray);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-group select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 9px 36px 9px 14px;
  font-size: var(--fs-sm);
  color: var(--color-black);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23666' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.filter-group select:hover {
  border-color: #c0c6cc;
}

.filter-group select:focus {
  outline: none;
  border-color: var(--color-primary-blue);
  box-shadow: 0 0 0 3px rgba(0,133,255,0.1);
}

.filters__reset {
  background: none;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 9px 20px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-gray);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filters__reset:hover {
  border-color: var(--color-cta-red);
  color: var(--color-cta-red);
  background: rgba(233,20,43,0.04);
}

/* ---------- CARD GRID ---------- */
.card-grid-section {
  flex: 1;
  padding: 32px 0 60px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ---------- CARD ---------- */
.roadmap-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.roadmap-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

/* Status stripe colors */
.roadmap-card[data-status="released"]::before {
  background: var(--status-released);
}
.roadmap-card[data-status="early-access"]::before {
  background: var(--status-early-access);
}
.roadmap-card[data-status="upcoming"]::before {
  background: var(--status-upcoming);
}

.roadmap-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
  border-color: transparent;
}

.roadmap-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.roadmap-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 600;
  line-height: 1.4;
}

.roadmap-card__badge--module {
  background: var(--color-bg-light-blue);
  color: #1a6db5;
}

.roadmap-card__badge--type {
  background: #eef1f4;
  color: #3d4f5f;
}

.roadmap-card__title {
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-black);
}

.roadmap-card__desc {
  font-size: var(--fs-sm);
  font-weight: 400;
  line-height: 1.65;
  color: var(--color-text-gray);
  flex: 1;
}

.roadmap-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary-blue);
  transition: gap var(--transition-fast), color var(--transition-fast);
  margin-top: auto;
}

.roadmap-card__link:hover {
  color: var(--color-primary-blue-hover);
  gap: 10px;
}

.roadmap-card__link-arrow {
  font-size: 16px;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.roadmap-card__link:hover .roadmap-card__link-arrow {
  transform: translateX(2px);
}

/* ---------- EMPTY STATE ---------- */
.empty-state {
  text-align: center;
  padding: 80px 20px;
}

.empty-state__icon {
  margin-bottom: 20px;
  opacity: 0.5;
}

.empty-state__text {
  font-size: var(--fs-md);
  color: var(--color-text-gray);
  margin-bottom: 20px;
}

.empty-state__reset {
  background: var(--color-primary-blue);
  color: var(--color-white);
  border: none;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  transition: background var(--transition-fast);
}

.empty-state__reset:hover {
  background: var(--color-primary-blue-hover);
}

/* ---------- FOOTER ---------- */
.roadmap-footer {
  background: var(--color-dark-bg);
  padding: 24px 0;
  text-align: center;
}

.roadmap-footer p {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.5);
}

/* ---------- ANIMATIONS ---------- */
@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.roadmap-card {
  animation: cardFadeIn 0.35s ease forwards;
}

.roadmap-card:nth-child(1) { animation-delay: 0.00s; }
.roadmap-card:nth-child(2) { animation-delay: 0.04s; }
.roadmap-card:nth-child(3) { animation-delay: 0.08s; }
.roadmap-card:nth-child(4) { animation-delay: 0.12s; }
.roadmap-card:nth-child(5) { animation-delay: 0.16s; }
.roadmap-card:nth-child(6) { animation-delay: 0.20s; }
.roadmap-card:nth-child(7) { animation-delay: 0.24s; }
.roadmap-card:nth-child(8) { animation-delay: 0.28s; }
.roadmap-card:nth-child(9) { animation-delay: 0.32s; }

/* ---------- RESULT COUNT ---------- */
.result-count {
  font-size: var(--fs-sm);
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.result-count strong {
  color: var(--color-black);
  font-weight: 600;
}

/* ======================================================
   RESPONSIVE DESIGN
   ====================================================== */

/* ---------- Tablet: 601px – 1024px ---------- */
@media (max-width: 1024px) {
  .roadmap-header {
    padding: 44px 0 40px;
  }

  .roadmap-header__title {
    font-size: 32px;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .filters__bar {
    gap: 16px;
  }

  .filter-group {
    min-width: 160px;
    flex: 1;
  }
}

/* ---------- Mobile: <= 600px ---------- */
@media (max-width: 600px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .roadmap-header {
    padding: 36px 0 32px;
  }

  .roadmap-header__title {
    font-size: 26px;
  }

  .roadmap-header__subtitle {
    font-size: var(--fs-base);
  }

  /* Tabs scroll horizontally */
  .status-tabs__list {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .status-tabs__list::-webkit-scrollbar {
    display: none;
  }

  .status-tab {
    padding: 14px 20px;
    font-size: var(--fs-sm);
  }

  /* Filters stack */
  .filters__bar {
    flex-direction: column;
    gap: 14px;
  }

  .filter-group {
    min-width: 100%;
  }

  .filters__reset {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  /* Card grid single column */
  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card-grid-section {
    padding: 24px 0 40px;
  }

  .roadmap-card {
    padding: 22px;
  }
}