/* ============================================================
   GATE 2027 CS Study Tracker — Stylesheet
   Theme: Official Exam Dossier / Admit Card
   ============================================================ */

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

:root {
  /* Core palette */
  --ink:        #101826;
  --ink-light:  #1b2a3e;
  --ink-mid:    #263650;
  --paper:      #F1EDE2;
  --paper-dim:  #E4DFCF;
  --paper-dark: #C9C2B0;
  --amber:      #E3A63E;
  --amber-dim:  #C48D2E;
  --amber-glow: rgba(227, 166, 62, 0.15);
  --teal:       #4C9A7C;
  --teal-dim:   #3A7B62;
  --teal-glow:  rgba(76, 154, 124, 0.15);
  --red:        #C1493F;
  --red-dim:    #A33B32;
  --white:      #FAFAF8;
  --text-ink:   #1A1A1A;
  --text-muted: #6B6555;

  /* Typography */
  --font-serif: 'IBM Plex Serif', Georgia, serif;
  --font-sans:  'IBM Plex Sans', system-ui, sans-serif;
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--ink);
  color: var(--white);
  min-height: 100vh;
}

/* ----- Focus styles ----- */
:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ============================================================
   ADMIT CARD HEADER
   ============================================================ */
.admit-card {
  background: var(--paper);
  color: var(--text-ink);
  padding: var(--space-lg) var(--space-xl);
  position: relative;
  overflow: hidden;
}

.admit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 79px,
      rgba(0,0,0,0.03) 79px,
      rgba(0,0,0,0.03) 80px
    );
  pointer-events: none;
}

.admit-card__inner {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

/* Barcode decorative bars */
.admit-card__barcode {
  display: flex;
  gap: 2px;
  height: 14px;
  margin-bottom: var(--space-lg);
  overflow: hidden;
}

.admit-card__barcode--bottom {
  margin-bottom: 0;
  margin-top: var(--space-lg);
}

.admit-card__barcode span {
  flex: 1;
  background: var(--ink);
  opacity: 0.7;
  border-radius: 1px;
}
.admit-card__barcode span:nth-child(odd)  { flex: 1;   }
.admit-card__barcode span:nth-child(even) { flex: 0.5; }
.admit-card__barcode span:nth-child(3n)   { flex: 1.5; opacity: 0.5; }
.admit-card__barcode span:nth-child(5n)   { flex: 0.3; opacity: 0.9; }
.admit-card__barcode span:nth-child(7n)   { flex: 2;   opacity: 0.4; }

/* Body layout */
.admit-card__body {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.admit-card__left {
  flex: 1 1 400px;
}

.admit-card__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.admit-card__title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

/* Fields */
.admit-card__fields {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.admit-card__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1 1 180px;
}

.admit-card__field-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.admit-card__input {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.admit-card__input::placeholder {
  color: var(--paper-dark);
  font-weight: 400;
}

.admit-card__input:focus {
  outline: none;
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-glow);
}

.admit-card__input--date {
  max-width: 200px;
}

/* Right side — stamp + countdown */
.admit-card__right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  flex: 0 0 auto;
}

.admit-card__stamp {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
  border: 3px solid var(--red);
  border-radius: var(--radius-sm);
  padding: var(--space-xs) var(--space-md);
  transform: rotate(-4deg);
  position: relative;
  text-align: center;
}

.admit-card__stamp::before {
  content: '';
  position: absolute;
  inset: -1px;
  border: 1px solid var(--red);
  border-radius: var(--radius-sm);
  opacity: 0.4;
}

.admit-card__countdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.admit-card__countdown-number {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.admit-card__countdown-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

/* ---- Section header ---- */
.section__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--ink-mid);
}

.section__number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--amber);
  background: rgba(227,166,62,0.12);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 600;
  color: var(--white);
}

/* ============================================================
   01 — OVERALL PROGRESS
   ============================================================ */
.progress-card {
  background: var(--ink-light);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
}

.progress-card__stats {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-sm);
}

.progress-card__fraction {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}

.progress-card__percent {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--amber);
}

.progress-bar {
  width: 100%;
  height: 14px;
  background: var(--ink-mid);
  border-radius: 7px;
  overflow: hidden;
  position: relative;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--amber-dim), var(--amber));
  border-radius: 7px;
  transition: width 0.5s var(--ease);
  position: relative;
}

.progress-bar__fill::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 30px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2));
  border-radius: 0 7px 7px 0;
}

.progress-card__sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  margin-top: var(--space-sm);
  letter-spacing: 0.05em;
}

/* ============================================================
   02 — SYLLABUS TRACKER
   ============================================================ */
.syllabus {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Subject accordion */
.subject {
  background: var(--ink-light);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s var(--ease);
}

.subject:hover {
  border-color: rgba(255,255,255,0.1);
}

.subject__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  user-select: none;
  background: transparent;
  border: none;
  width: 100%;
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 1rem;
  text-align: left;
  transition: background 0.15s var(--ease);
}

.subject__header:hover {
  background: rgba(255,255,255,0.03);
}

.subject__chevron {
  font-size: 0.7rem;
  transition: transform 0.25s var(--ease);
  color: var(--amber);
  flex-shrink: 0;
}

.subject--expanded .subject__chevron {
  transform: rotate(90deg);
}

.subject__name {
  font-weight: 600;
  flex: 1;
}

.subject__count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  flex-shrink: 0;
}

.subject__count--done {
  color: var(--teal);
}

.subject__mini-bar {
  width: 60px;
  height: 4px;
  background: var(--ink-mid);
  border-radius: 2px;
  overflow: hidden;
  flex-shrink: 0;
}

.subject__mini-bar-fill {
  height: 100%;
  background: var(--teal);
  border-radius: 2px;
  transition: width 0.4s var(--ease);
}

/* Topic list */
.subject__topics {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}

.subject--expanded .subject__topics {
  max-height: 600px;
}

.topic {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-lg) var(--space-sm) calc(var(--space-lg) + var(--space-xl));
  border-top: 1px solid rgba(255,255,255,0.04);
  transition: background 0.15s var(--ease);
  cursor: pointer;
}

.topic:hover {
  background: rgba(255,255,255,0.02);
}

.topic__checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--ink-mid);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.topic__checkbox:hover {
  border-color: var(--amber);
}

.topic__checkbox:checked {
  border-color: var(--teal);
  background: var(--teal);
}

.topic__checkbox:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 12px;
  font-weight: 700;
}

.topic__label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  cursor: pointer;
  transition: color 0.15s var(--ease);
}

.topic--done .topic__label {
  text-decoration: line-through;
  color: rgba(255,255,255,0.35);
}

/* ============================================================
   SHARED FORM STYLES
   ============================================================ */
.btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s var(--ease), transform 0.1s var(--ease), box-shadow 0.2s var(--ease);
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--amber);
  color: var(--ink);
}

.btn--primary:hover {
  background: var(--amber-dim);
  box-shadow: 0 2px 12px var(--amber-glow);
}

.btn--danger {
  background: transparent;
  color: var(--red);
  font-size: 0.7rem;
  padding: 4px 10px;
  border: 1px solid var(--red-dim);
}

.btn--danger:hover {
  background: rgba(193, 73, 63, 0.15);
}

/* ============================================================
   03 — DAILY STUDY LOG
   ============================================================ */
.log-card {
  background: var(--ink-light);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
}

.log-form__fields {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.log-form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1 1 150px;
}

.log-form__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}

.log-form__input {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: var(--white);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.log-form__input:focus {
  outline: none;
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-glow);
}

.log-form__select {
  cursor: pointer;
}

/* Total hours */
.log-total {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--ink-mid);
  margin-top: var(--space-md);
}

.log-total__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.05em;
}

.log-total__value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--amber);
}

/* Table */
.log-table-wrap {
  margin-top: var(--space-md);
  overflow-x: auto;
}

.log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.log-table thead {
  border-bottom: 2px solid var(--ink-mid);
}

.log-table th {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  text-align: left;
  padding: var(--space-sm) var(--space-md);
}

.log-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.8);
}

.log-table__action-col {
  width: 80px;
  text-align: right;
}

.log-table td:last-child {
  text-align: right;
}

.empty-state {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
  text-align: center;
  padding: var(--space-xl);
  letter-spacing: 0.03em;
}

/* ============================================================
   04 — MOCK TEST RECORD
   ============================================================ */
.mock-card {
  background: var(--ink-light);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
}

.mock-form__fields {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.mock-form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1 1 140px;
}

.mock-form__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}

.mock-form__input {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: var(--white);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.mock-form__input:focus {
  outline: none;
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-glow);
}

/* Stats */
.mock-stats {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--ink-mid);
  margin-top: var(--space-md);
}

.mock-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mock-stat__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}

.mock-stat__value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--amber);
}

.mock-stat__value--best {
  color: var(--teal);
}

/* Bar chart */
.mock-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  min-height: 160px;
  padding: var(--space-md) 0;
  overflow-x: auto;
}

.mock-bar-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 1 1 40px;
  max-width: 80px;
  min-width: 36px;
}

.mock-bar-wrap {
  width: 100%;
  height: 120px;
  display: flex;
  align-items: flex-end;
}

.mock-bar {
  width: 100%;
  background: linear-gradient(to top, var(--amber-dim), var(--amber));
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: height 0.4s var(--ease);
  position: relative;
  min-height: 4px;
}

.mock-bar__pct {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--amber);
  white-space: nowrap;
}

.mock-bar-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: rgba(255,255,255,0.35);
  text-align: center;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
  border-top: 1px solid var(--ink-mid);
  margin-top: var(--space-xl);
}

.footer p {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.1em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .admit-card {
    padding: var(--space-md);
  }

  .admit-card__body {
    flex-direction: column;
    align-items: stretch;
  }

  .admit-card__right {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .admit-card__countdown {
    align-items: flex-end;
  }

  .main {
    padding: var(--space-xl) var(--space-md);
    gap: var(--space-2xl);
  }

  .progress-card,
  .log-card,
  .mock-card {
    padding: var(--space-md);
  }

  .topic {
    padding-left: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .admit-card__fields {
    flex-direction: column;
  }

  .admit-card__input--date {
    max-width: 100%;
  }

  .log-form__fields,
  .mock-form__fields {
    flex-direction: column;
  }

  .mock-stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .section__header {
    flex-wrap: wrap;
  }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.section {
  animation: fadeIn 0.4s var(--ease) both;
}

.section:nth-child(1) { animation-delay: 0.05s; }
.section:nth-child(2) { animation-delay: 0.1s; }
.section:nth-child(3) { animation-delay: 0.15s; }
.section:nth-child(4) { animation-delay: 0.2s; }