/* -------------------------------------------------------
   Date Calculator - Styles
   ------------------------------------------------------- */

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2e3345;
  --text: #e8eaed;
  --text-muted: #9aa0b0;
  --accent: #6c63ff;
  --accent-hover: #8078ff;
  --green: #34d399;
  --red: #f87171;
  --yellow: #fbbf24;
  --radius: 8px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* -------------------------------------------------------
   Layout
   ------------------------------------------------------- */

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
}

header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

nav .container {
  display: flex;
  gap: 1.25rem;
  white-space: nowrap;
  justify-content: center;
}

nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.25rem 0;
}
nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

main {
  padding: 1.25rem 0 2rem;
}

/* -------------------------------------------------------
   Cards
   ------------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* -------------------------------------------------------
   Form Elements
   ------------------------------------------------------- */

.form-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.form-group {
  flex: 1;
  min-width: 140px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  font-weight: 500;
}

input[type="date"],
input[type="number"],
select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
  min-height: 44px;
}

input[type="date"]:focus,
input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(108, 99, 255, 0.25);
}

/* Fix date input icon color in dark mode */
input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.8);
  cursor: pointer;
  padding: 4px;
}

select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239aa0b0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

.input-with-select {
  display: flex;
  gap: 0.5rem;
}

.input-with-select input {
  flex: 1;
  min-width: 80px;
}

.input-with-select select {
  flex: 1;
  min-width: 100px;
}

/* -------------------------------------------------------
   Quick Shortcuts (pill buttons)
   ------------------------------------------------------- */

.shortcuts-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.pill {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  padding: 0.5rem 1rem;
  cursor: pointer;
  white-space: nowrap;
  min-height: 40px;
  transition: border-color 0.15s, background 0.15s;
}

.pill:hover {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
}

.pill:active,
.pill.active {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.2);
  color: #fff;
}

/* -------------------------------------------------------
   Results
   ------------------------------------------------------- */

.result-box {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.result-box.hidden {
  display: none;
}

.result-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.result-date {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.result-details {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.result-detail {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.result-detail strong {
  color: var(--text);
}

/* -------------------------------------------------------
   At a Glance - marker cards
   ------------------------------------------------------- */

.glance-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.glance-header h2 {
  margin-bottom: 0;
}

.glance-start {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.glance-start label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.glance-start input[type="date"] {
  width: auto;
  min-width: 140px;
  padding: 0.4rem 0.6rem;
  font-size: 0.85rem;
  min-height: 36px;
}

/* 90-day card accent styling */
.card-90 {
  border-color: var(--green);
  border-width: 2px;
}

.card-90 h2 {
  color: var(--green);
}

.card-90 .glance-card.glance-today {
  border-color: var(--green);
  background: rgba(52, 211, 153, 0.1);
}

.card-90 .glance-today .glance-date {
  color: var(--green);
}

.card-90 .cal-endpoint,
.card-90 .cal-marked {
  background: var(--green);
  color: #0f1117;
}

.card-90 .cal-in-range {
  background: rgba(52, 211, 153, 0.12);
}

.card-90 .cal-today {
  outline-color: var(--green);
}

.card-90 .glance-start input[type="date"]:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(52, 211, 153, 0.25);
}

.glance-markers {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.5rem;
  margin-bottom: 0.75rem;
}

.glance-card {
  flex: 0 0 auto;
  min-width: 90px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.75rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.glance-card.glance-today {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
}

.glance-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

.glance-date {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.glance-today .glance-date {
  color: var(--accent);
}

.glance-dow {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* -------------------------------------------------------
   Calendar grid (shared by all sections)
   ------------------------------------------------------- */

.calendar-wrap,
.timeline-wrap {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.75rem 0 0.25rem;
}

.cal-month {
  flex: 0 0 auto;
  min-width: 180px;
}

.cal-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 0.35rem;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
}

.cal-hdr {
  font-size: 0.6rem;
  color: var(--text-muted);
  text-align: center;
  padding: 0.15rem 0;
  font-weight: 600;
}

.cal-day {
  font-size: 0.7rem;
  text-align: center;
  padding: 0.25rem 0.1rem;
  border-radius: 3px;
  color: var(--text-muted);
}

.cal-blank {
  visibility: hidden;
}

.cal-in-range {
  background: rgba(108, 99, 255, 0.12);
  color: var(--text);
}

.cal-endpoint {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.cal-marked {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  position: relative;
}

.cal-today {
  outline: 1px solid var(--accent);
  outline-offset: -1px;
}

.cal-ellipsis {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.2rem;
  min-width: 30px;
}

/* -------------------------------------------------------
   Ad Slots
   ------------------------------------------------------- */

.ad-slot {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 1.25rem;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* -------------------------------------------------------
   Guide / SEO Content
   ------------------------------------------------------- */

.guide-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
}

.guide-content h3:first-child {
  margin-top: 0;
}

.guide-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.guide-content ul {
  list-style: none;
  padding: 0;
  margin-bottom: 0.75rem;
}

.guide-content li {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0.3rem 0 0.3rem 1rem;
  position: relative;
}

.guide-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

/* -------------------------------------------------------
   Footer
   ------------------------------------------------------- */

footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  text-align: center;
}

footer p {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* -------------------------------------------------------
   Responsive
   ------------------------------------------------------- */

@media (max-width: 600px) {
  header h1 {
    font-size: 1.3rem;
  }

  .form-row {
    flex-direction: column;
  }

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

  .result-date {
    font-size: 1.2rem;
  }

  .result-details {
    flex-direction: column;
    gap: 0.25rem;
  }

  nav .container {
    justify-content: flex-start;
    padding: 0 1rem;
  }

  .glance-card {
    min-width: 80px;
    padding: 0.5rem 0.6rem;
  }

  .glance-date {
    font-size: 0.9rem;
  }

  .cal-month {
    min-width: 170px;
  }
}

@media (min-width: 601px) and (max-width: 900px) {
  .form-group {
    min-width: 45%;
  }
}