:root {
  --bg: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --ink: #172033;
  --muted: #68758b;
  --line: rgba(23, 32, 51, 0.1);
  --blue: #477cff;
  --green: #21b573;
  --yellow: #f2b84b;
  --red: #ef5b6d;
  --shadow: 0 18px 50px rgba(31, 43, 70, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100svh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 10%, rgba(71, 124, 255, 0.14), transparent 30rem),
    radial-gradient(circle at 92% 18%, rgba(33, 181, 115, 0.12), transparent 26rem),
    linear-gradient(135deg, #f8fafc, var(--bg));
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  min-height: 100svh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100svh;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 34px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  color: white;
  background: var(--ink);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small,
.muted {
  color: var(--muted);
}

nav {
  display: grid;
  gap: 8px;
}

nav a,
.focus-toggle,
.ghost {
  border: 0;
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--muted);
  text-align: left;
  text-decoration: none;
  background: transparent;
  transition: background 0.18s ease, color 0.18s ease;
}

nav a:hover,
nav a.active,
.focus-toggle:hover,
.ghost:hover {
  color: var(--ink);
  background: rgba(71, 124, 255, 0.1);
}

.focus-toggle {
  width: 100%;
  margin-top: 28px;
  color: white;
  text-align: center;
  background: var(--ink);
}

.main {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 28px;
}

.hero {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 5.4rem);
  line-height: 0.94;
}

.hero p:last-child {
  max-width: 560px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.clock-card {
  display: grid;
  align-content: center;
  min-width: 190px;
  border-radius: 20px;
  padding: 20px;
  color: white;
  background: linear-gradient(145deg, var(--ink), #2d426d);
}

.clock-card span {
  font-size: 2.4rem;
  font-weight: 800;
}

.clock-card small {
  color: rgba(255, 255, 255, 0.72);
}

.grid,
.content-grid {
  display: grid;
  gap: 18px;
}

.overview-grid {
  grid-template-columns: 1.2fr 1fr;
  margin-bottom: 18px;
}

.content-grid {
  grid-template-columns: minmax(0, 1.25fr) minmax(330px, 0.75fr);
  align-items: start;
}

.left-stack,
.right-stack {
  display: grid;
  gap: 18px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  font-weight: 800;
}

.goal-card input,
.inline-form input,
.gpa-form input,
.gpa-form select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  outline: 0;
  padding: 12px 13px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
}

textarea {
  min-height: 150px;
  resize: vertical;
}

.inline-form,
.gpa-form {
  display: grid;
  gap: 10px;
}

.inline-form {
  grid-template-columns: 1fr 160px auto;
}

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

.gpa-form {
  grid-template-columns: 1fr 90px 96px auto;
}

.inline-form button,
.gpa-form button,
.timer-actions button,
#exitFocus {
  border: 0;
  border-radius: 14px;
  padding: 0 16px;
  color: white;
  background: var(--blue);
  font-weight: 800;
}

.list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.66);
}

.item strong,
.item small {
  display: block;
}

.item small {
  margin-top: 4px;
  color: var(--muted);
}

.item.overdue {
  border-color: rgba(239, 91, 109, 0.35);
  background: rgba(239, 91, 109, 0.08);
}

.item button {
  border: 0;
  border-radius: 10px;
  padding: 8px 10px;
  color: var(--muted);
  background: rgba(23, 32, 51, 0.06);
}

.compact .item {
  grid-template-columns: auto 1fr auto;
}

.todo-check {
  width: 20px;
  height: 20px;
  accent-color: var(--green);
}

.done strong {
  color: var(--muted);
  text-decoration: line-through;
}

.progress {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(23, 32, 51, 0.08);
}

.progress i {
  display: block;
  width: 50%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue), var(--green));
  transition: width 0.25s ease;
}

.progress.danger i {
  background: linear-gradient(90deg, var(--yellow), var(--red));
}

.semester-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.semester-fields label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.semester-fields input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 11px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
}

.timer-card {
  text-align: center;
}

.timer-ring {
  display: grid;
  place-items: center;
  width: 220px;
  height: 220px;
  margin: 12px auto 18px;
  border-radius: 50%;
  background:
    radial-gradient(circle, var(--surface-solid) 0 58%, transparent 59%),
    conic-gradient(var(--blue) var(--timer-progress, 0%), rgba(23, 32, 51, 0.08) 0);
}

.timer-ring span {
  font-size: 2.7rem;
  font-weight: 900;
}

.timer-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.timer-actions button:last-child {
  color: var(--ink);
  background: rgba(23, 32, 51, 0.08);
}

.stats-card {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.stats-card div {
  border-radius: 14px;
  padding: 12px;
  background: rgba(23, 32, 51, 0.05);
}

.stats-card span,
.stats-card strong {
  display: block;
}

.stats-card span {
  color: var(--muted);
  font-size: 0.8rem;
}

.focus-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  visibility: hidden;
  opacity: 0;
  padding: 22px;
  color: white;
  background:
    linear-gradient(rgba(9, 15, 28, 0.86), rgba(9, 15, 28, 0.86)),
    repeating-linear-gradient(120deg, rgba(255, 255, 255, 0.06) 0 2px, transparent 2px 12px);
  transition: opacity 0.22s ease, visibility 0s linear 0.22s;
}

.focus-backdrop.active {
  visibility: visible;
  opacity: 1;
  transition-delay: 0s;
}

.focus-backdrop div {
  width: min(560px, 100%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 28px;
  padding: 36px;
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.28);
}

.focus-backdrop span,
.focus-backdrop strong {
  display: block;
}

.focus-backdrop span {
  color: rgba(255, 255, 255, 0.7);
  font-weight: 800;
  text-transform: uppercase;
}

.focus-backdrop strong {
  margin: 14px 0 24px;
  font-size: clamp(4rem, 18vw, 8rem);
  line-height: 0.95;
}

body.focused .app {
  filter: blur(4px) brightness(0.72);
}

@media (max-width: 980px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
  }

  nav {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  nav a {
    text-align: center;
  }

  .focus-toggle {
    margin-top: 0;
  }

  .overview-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .main {
    padding: 14px;
  }

  .hero {
    flex-direction: column;
  }

  .clock-card {
    min-width: 0;
  }

  .inline-form,
  .gpa-form,
  .todo-form,
  .stats-card,
  nav {
    grid-template-columns: 1fr;
  }

  .timer-ring {
    width: 190px;
    height: 190px;
  }
}