/* ============================================================
   বাইতুস ছাদাকাহ ফাউন্ডেশন — সিরাত প্রতিযোগিতা
   style.css — তিনটা HTML পেজেই শেয়ার্ড
   ============================================================ */

/* ---------- ফন্ট ---------- */
@import url("https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@400;500;600;700&family=Noto+Serif+Bengali:wght@600;700&display=swap");

/* ---------- CSS ভেরিয়েবল ---------- */
:root {
  --color-primary: #0b5e34;        /* গাঢ় সবুজ */
  --color-primary-dark: #073e22;
  --color-primary-light: #e8f4ec;
  --color-gold: #c8a24a;
  --color-gold-light: #f3e9d2;
  --color-gold-dark: #9c7d31;

  --color-bg: #f7f6f1;
  --color-surface: #ffffff;
  --color-border: #e2ddce;

  --color-text: #1f2a24;
  --color-text-muted: #5b665e;
  --color-text-inverse: #ffffff;

  --color-success: #1e7e34;
  --color-success-bg: #e6f4ea;
  --color-error: #b3261e;
  --color-error-bg: #fdecea;
  --color-info: #2a5788;
  --color-info-bg: #eaf2fb;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --shadow-sm: 0 1px 3px rgba(11, 94, 52, 0.08);
  --shadow-md: 0 4px 16px rgba(11, 94, 52, 0.12);
  --shadow-lg: 0 8px 32px rgba(11, 94, 52, 0.16);

  --font-body: "Hind Siliguri", "Noto Sans Bengali", sans-serif;
  --font-heading: "Noto Serif Bengali", "Hind Siliguri", serif;
}

/* ---------- রিসেট ---------- */
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
}

button {
  font-family: inherit;
  cursor: pointer;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: 1rem;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ============================================================
   হেডার / ব্যানার
   ============================================================ */

.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  padding: 28px 16px;
  text-align: center;
  box-shadow: var(--shadow-md);
  position: relative;
  border-bottom: 4px solid var(--color-gold);
}

.site-header .org-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  color: var(--color-gold-light);
  margin: 0 0 6px;
}

.site-header .exam-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0;
}

@media (min-width: 640px) {
  .site-header .exam-title {
    font-size: 2rem;
  }
}

.page-body {
  padding: 24px 0 60px;
}

/* ============================================================
   কার্ড / সেকশন — বেসিক
   ============================================================ */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin: 0 auto 24px;
  max-width: 520px;
}

.card-wide {
  max-width: 720px;
}

.card h2 {
  font-family: var(--font-heading);
  color: var(--color-primary-dark);
  margin-top: 0;
  border-bottom: 2px solid var(--color-gold-light);
  padding-bottom: 10px;
}

/* ============================================================
   ফর্ম উপাদান
   ============================================================ */

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-primary-dark);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="tel"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
  font-family: "Courier New", monospace;
  font-size: 0.92rem;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.checkbox-row input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
}

.checkbox-row label {
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 0;
}

/* ---------- বাটন ---------- */

.btn {
  display: inline-block;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.1s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

.btn-gold {
  background: var(--color-gold);
  color: var(--color-primary-dark);
}

.btn-gold:hover:not(:disabled) {
  background: var(--color-gold-dark);
  color: #fff;
}

.btn-secondary {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-primary);
  color: #fff;
}

.btn-danger {
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1.5px solid var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-error);
  color: #fff;
}

.btn-block {
  width: 100%;
  text-align: center;
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================================
   স্ট্যাটাস মেসেজ
   ============================================================ */

.status-message {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin: 12px 0;
  white-space: pre-line;
  font-size: 0.95rem;
  display: none;
}

.status-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
  display: block;
}

.status-error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid var(--color-error);
  display: block;
}

.status-info {
  background: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid var(--color-info);
  display: block;
}

/* ============================================================
   অ্যাডমিন প্যানেল
   ============================================================ */

#admin-panel {
  display: none;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  max-width: 720px;
  margin: 0 auto 20px;
  padding: 0 4px;
}

.admin-header h1 {
  font-family: var(--font-heading);
  color: var(--color-primary-dark);
  font-size: 1.4rem;
  margin: 0;
}

/* ---------- নির্দেশিকা / accordion ---------- */

.guide-accordion {
  max-width: 720px;
  margin: 0 auto 24px;
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-lg);
  background: var(--color-gold-light);
  overflow: hidden;
}

.guide-accordion summary {
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 700;
  color: var(--color-primary-dark);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.guide-accordion summary::-webkit-details-marker {
  display: none;
}

.guide-accordion summary::after {
  content: "▾";
  font-size: 1.1rem;
  transition: transform 0.15s ease;
}

.guide-accordion[open] summary::after {
  transform: rotate(180deg);
}

.guide-content {
  padding: 4px 20px 20px;
}

.guide-content h3 {
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.guide-content pre {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  overflow-x: auto;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.guide-content .guide-note {
  background: var(--color-info-bg);
  border-left: 4px solid var(--color-info);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin: 10px 0;
}

/* ---------- প্রশ্ন প্রিভিউ কার্ড (admin) ---------- */

.question-preview-card {
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 10px 0;
}

.question-preview-card ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.question-preview-card li.correct-option {
  color: var(--color-success);
  font-weight: 700;
}

#csv-upload-progress,
#questions-a-status,
#questions-b-status {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* ============================================================
   ছাত্র লগইন / এক্সাম পেজ
   ============================================================ */

#exam-container,
#thank-you-section {
  display: none;
}

.exam-instructions {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: 18px;
}

/* ---------- স্টিকি টাইমার ---------- */

.exam-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-gold);
  box-shadow: var(--shadow-sm);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

#exam-progress {
  font-weight: 600;
  color: var(--color-primary-dark);
}

.timer-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary-light);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 8px 16px;
}

.timer-box .timer-label {
  font-size: 0.85rem;
  color: var(--color-primary-dark);
  font-weight: 600;
}

#exam-timer {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  font-variant-numeric: tabular-nums;
}

#exam-timer.timer-warning {
  color: var(--color-error);
  animation: pulse-warning 1s infinite;
}

@keyframes pulse-warning {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ---------- প্রশ্নের কার্ড ---------- */

#questions-list {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}

.question-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.question-text {
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 14px;
  color: var(--color-text);
}

.q-number {
  color: var(--color-gold-dark);
  font-weight: 700;
  margin-right: 4px;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease;
}

.option-label:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.option-label input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.option-label:has(input:checked) {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  font-weight: 600;
}

.submit-exam-bar {
  max-width: 720px;
  margin: 24px auto 0;
  padding: 0 16px;
  text-align: center;
}

/* ---------- থ্যাংক ইউ স্ক্রিন ---------- */

#thank-you-section {
  text-align: center;
  max-width: 520px;
}

#thank-you-section .thank-you-icon {
  font-size: 3rem;
  color: var(--color-gold);
  margin-bottom: 10px;
}

/* ============================================================
   রেজাল্ট পেজ
   ============================================================ */

#results-not-published {
  text-align: center;
  max-width: 520px;
  margin: 60px auto;
}

#results-not-published .icon {
  font-size: 2.5rem;
  color: var(--color-gold);
}

#results-content {
  display: none;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 16px;
}

.results-summary-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 24px;
}

.summary-card {
  background: var(--color-surface);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  text-align: center;
  min-width: 140px;
  box-shadow: var(--shadow-sm);
}

.summary-card .summary-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.summary-card .summary-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.results-filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  align-items: center;
}

.results-filters select,
.results-filters input {
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.results-filters input {
  flex: 1;
  min-width: 180px;
}

.results-table-wrapper {
  overflow-x: auto;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

table.results-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 480px;
}

table.results-table thead {
  background: var(--color-primary);
  color: #fff;
}

table.results-table th,
table.results-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

table.results-table tbody tr:nth-child(even) {
  background: var(--color-primary-light);
}

table.results-table tbody tr:hover {
  background: var(--color-gold-light);
}

.results-export-row {
  margin-top: 18px;
  text-align: right;
}

/* ============================================================
   ফুটার
   ============================================================ */

.site-footer {
  text-align: center;
  padding: 20px 16px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ============================================================
   রেসপন্সিভ সমন্বয়
   ============================================================ */

@media (max-width: 480px) {
  .card {
    padding: 18px;
    border-radius: var(--radius-md);
  }

  .btn {
    width: 100%;
  }

  .btn-row .btn {
    width: auto;
    flex: 1;
  }

  .exam-topbar {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  table.results-table th,
  table.results-table td {
    padding: 9px 10px;
    font-size: 0.88rem;
  }
}