/* ═══════════════════════════════════════════════════════
   INTERNSHIP LOGBOOK 2026 — Stylesheet
   ═══════════════════════════════════════════════════════ */

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

:root {
  /* Colour palette */
  --bg-primary: #0c0f17;
  --bg-secondary: #131825;
  --bg-card: #181e2e;
  --bg-card-hover: #1e2640;
  --bg-input: #1a2035;
  --border: #252d44;
  --border-hover: #354063;

  --text-primary: #e8eaf0;
  --text-secondary: #8b93a8;
  --text-muted: #5a6380;

  --accent: #6c5ce7;
  --accent-glow: rgba(108, 92, 231, 0.25);
  --accent-hover: #7e70f0;
  --accent-subtle: rgba(108, 92, 231, 0.12);

  --success: #00d2a0;
  --success-bg: rgba(0, 210, 160, 0.1);
  --danger: #ff6b6b;
  --danger-bg: rgba(255, 107, 107, 0.1);
  --warning: #ffc048;
  --warning-bg: rgba(255, 192, 72, 0.1);

  --today: #6c5ce7;
  --today-glow: rgba(0, 180, 216, 0.15);
  --absent: #ff6b6b;
  --absent-bg: rgba(255, 107, 107, 0.08);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 30px var(--accent-glow);

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Sticky Header ── */
#app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 15, 23, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 0 16px var(--accent-glow);
}

.header-titles {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.user-name {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--accent);
  line-height: 1;
}

.app-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
  line-height: 1.3;
  color: var(--text-primary);
}

.year-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  background: var(--accent-subtle);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 6px;
  vertical-align: middle;
  margin-left: 4px;
}

.header-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 9px 14px;
}

.btn-ghost:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-icon:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-icon.danger:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

.btn-absent {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
  transition: all var(--transition);
}

.btn-absent:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-bg);
}

.btn-absent.active {
  border-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
}

.btn-add-task {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}

.btn-add-task:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

/* ── Main Container ── */
#log-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

/* ── Loading ── */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 80px 0;
  color: var(--text-muted);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ── Day Card ── */
.day-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  overflow: hidden;
  transition: all var(--transition);
  animation: cardIn 0.4s ease both;
}

.day-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

.day-card.is-today {
  border-color: var(--today);
  box-shadow: 0 0 0 1px var(--today), 0 0 30px var(--today-glow);
}

.day-card.is-absent {
  border-color: rgba(255, 107, 107, 0.25);
  background: var(--absent-bg);
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

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

.day-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
}

.day-date-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.day-number {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: var(--text-primary);
}

.is-today .day-number {
  background: var(--today);
  color: #fff;
  box-shadow: 0 0 16px var(--today-glow);
}

.day-meta {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.day-date-text {
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
}

.day-day-name {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.day-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.day-status-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 4px 10px;
  border-radius: 6px;
}

.day-status-badge.present {
  background: var(--success-bg);
  color: var(--success);
}

.day-status-badge.absent {
  background: var(--danger-bg);
  color: var(--danger);
}

.is-today .day-status-badge.present::before {
  content: '● ';
}

/* ── Task List ── */
.day-body {
  padding: 16px 22px 18px;
}

.no-tasks {
  text-align: center;
  padding: 24px 0;
  color: var(--text-muted);
  font-size: 14px;
  font-style: italic;
}

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

.task-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: all var(--transition);
  animation: taskIn 0.3s ease both;
}

.task-item:hover {
  border-color: var(--border);
  background: var(--bg-secondary);
}

@keyframes taskIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }

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

.task-time-col {
  flex-shrink: 0;
  text-align: center;
}

.task-time {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-subtle);
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
}

.task-content {
  flex: 1;
  min-width: 0;
}

.task-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.task-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.task-remark {
  font-size: 12px;
  color: var(--text-muted);
}

.task-remark span {
  color: var(--warning);
  font-weight: 500;
}

.task-actions {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.task-item:hover .task-actions {
  opacity: 1;
}

.day-footer {
  padding: 0 22px 16px;
}

/* ── Modal ── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 480px;
  max-width: 92vw;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-backdrop.active .modal {
  transform: translateY(0) scale(1);
}

.modal-sm {
  width: 360px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px 0;
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 700;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-card);
  color: var(--text-secondary);
  border-radius: 8px;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.modal-close:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

/* ── Form ── */
#task-form,
#day-form {
  padding: 20px 24px 24px;
}

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

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: all var(--transition);
}

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

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}

/* ── Toast ── */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: toastIn 0.35s ease;
}

.toast.success {
  border-color: var(--success);
}

.toast.error {
  border-color: var(--danger);
}

.toast-icon {
  font-size: 16px;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }

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

.toast.removing {
  animation: toastOut 0.25s ease forwards;
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-muted);
}

.empty-state svg {
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 15px;
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .header-inner {
    height: auto;
    padding: 14px 0;
    flex-wrap: wrap;
    gap: 12px;
  }

  .header-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .app-title {
    font-size: 17px;
  }

  #log-container {
    padding: 20px 14px 60px;
  }

  .day-header {
    flex-wrap: wrap;
    gap: 12px;
    padding: 14px 16px;
  }

  .day-body {
    padding: 12px 16px 14px;
  }

  .task-item {
    flex-direction: column;
    gap: 8px;
  }

  .task-actions {
    opacity: 1;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .day-footer {
    padding: 0 16px 12px;
  }
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ── Delete confirm ── */
.confirm-overlay {
  position: fixed;
  inset: 0;
  z-index: 250;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.confirm-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 360px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.confirm-box p {
  font-size: 15px;
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.confirm-box .confirm-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-danger:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}