/* =========================================================
   Academ — Samuel Ojetunde | Student Portfolio & Academic Planner
   Design system: dark navy base, cyan/indigo accent gradient
   ========================================================= */

:root {
  --bg: #0b1220;
  --bg-alt: #0f1830;
  --surface: #141d34;
  --surface-alt: #1b2640;
  --border: #263252;
  --text: #eaf0fb;
  --text-muted: #93a1bd;
  --text-faint: #64729a;
  --accent: #22d3ee;
  --accent-2: #818cf8;
  --accent-warm: #f5b942;
  --success: #34d399;
  --danger: #f87171;
  --gradient: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 20px 50px -18px rgba(0, 0, 0, 0.65);
  --nav-height: 72px;
  --max-width: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", "Inter", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(700px circle at 12% -10%, rgba(34, 211, 238, 0.14), transparent 55%),
    radial-gradient(600px circle at 100% 10%, rgba(129, 140, 248, 0.12), transparent 50%),
    var(--bg);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.4rem);
}

h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.3rem);
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
}

p {
  color: var(--text-muted);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

section {
  padding: clamp(3rem, 6vw, 5.5rem) 0;
}

.section-head {
  max-width: 640px;
  margin-bottom: 2.5rem;
}

.section-head p {
  margin-top: 0.6rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn-primary {
  background: var(--gradient);
  color: #061019;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px -10px rgba(34, 211, 238, 0.45);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn:active {
  transform: translateY(0);
}

.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(11, 18, 32, 0.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.15rem;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  color: #061019;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.4rem 0.1rem;
  transition: color 0.2s var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  height: 2px;
  width: 0;
  background: var(--gradient);
  transition: width 0.25s var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: 4rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s var(--ease);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-note {
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* ---------- Hero ---------- */
.hero {
  padding-top: clamp(2.5rem, 6vw, 4rem);
  padding-bottom: 1rem;
}

.hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-copy {
  max-width: 700px;
}

.hero-photo-corner {
  position: absolute;
  top: -0.75rem;
  right: 0.5rem;
  width: 136px;
  height: 136px;
  border-radius: 50%;
  padding: 3px;
  background: var(--gradient);
  box-shadow: 0 16px 34px -14px rgba(34, 211, 238, 0.5);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.hero-photo-corner:hover {
  transform: translateY(-4px) rotate(3deg);
  box-shadow: 0 20px 40px -14px rgba(34, 211, 238, 0.6);
}

.hero-photo-corner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
  background: var(--surface);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin: 1.4rem 0 1.8rem;
}

.tag {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hero p.lead {
  font-size: 1.08rem;
  max-width: 54ch;
  margin-inline: auto;
}

/* ---------- Cards / Grid ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: var(--shadow);
}

.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 211, 238, 0.12);
  color: var(--accent);
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin-bottom: 0.5rem;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Page header (inner pages) ---------- */
.page-header {
  padding: clamp(2.5rem, 5vw, 4rem) 0 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.breadcrumb {
  color: var(--text-faint);
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
}

.breadcrumb a {
  color: var(--accent);
}

/* ---------- About page ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.list-check li,
.list-dot li {
  position: relative;
  padding-left: 1.6rem;
  margin-bottom: 0.65rem;
  color: var(--text-muted);
}

.list-check li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--success);
  font-size: 0.85rem;
}

.list-dot li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

caption {
  caption-side: top;
  text-align: left;
  font-weight: 700;
  padding-bottom: 0.8rem;
  color: var(--text);
}

th,
td {
  padding: 0.9rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

th {
  background: var(--surface-alt);
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: none;
}

.skills-wrap {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.skill-row {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.skill-row .skill-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text);
}

.skill-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--surface-alt);
  overflow: hidden;
  border: 1px solid var(--border);
}

.skill-bar span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--gradient);
  width: 0;
  transition: width 1.1s var(--ease);
}

/* ---------- Projects ---------- */
.project-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-banner {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.05em;
}

.project-body {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  flex: 1;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-links {
  margin-top: auto;
  display: flex;
  gap: 0.9rem;
  padding-top: 0.6rem;
}

.project-links a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.project-links a:hover {
  color: var(--accent-2);
}

/* ---------- Planner ---------- */
.planner-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 2rem;
  align-items: start;
}

.planner-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  position: sticky;
  top: calc(var(--nav-height) + 1.5rem);
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
}

input,
textarea,
select {
  width: 100%;
  padding: 0.75rem 0.9rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

input.invalid,
textarea.invalid {
  border-color: var(--danger);
}

.field-error {
  color: var(--danger);
  font-size: 0.78rem;
  margin-top: 0.35rem;
  min-height: 1em;
}

.planner-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.stat-pill {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1.3rem;
  min-width: 120px;
}

.stat-pill .num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}

.stat-pill .label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-bar {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}

.filter-btn.active,
.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.task-item {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  animation: slideIn 0.35s var(--ease);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.task-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  flex-shrink: 0;
  margin-top: 0.15rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  transition: background 0.2s var(--ease);
}

.task-check::after {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient);
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

.task-item.completed .task-check {
  background: var(--gradient);
  border-color: transparent;
}

.task-item.completed .task-check::after {
  opacity: 1;
  background: #061019;
}

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

.task-title {
  font-weight: 600;
  color: var(--text);
  word-break: break-word;
}

.task-item.completed .task-title {
  text-decoration: line-through;
  color: var(--text-faint);
}

.task-meta {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-faint);
}

.task-meta .badge {
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
}

.badge.priority-high {
  color: var(--danger);
  border-color: rgba(248, 113, 113, 0.4);
}

.badge.priority-medium {
  color: var(--accent-warm);
  border-color: rgba(245, 185, 66, 0.4);
}

.badge.priority-low {
  color: var(--success);
  border-color: rgba(52, 211, 153, 0.4);
}

.task-delete {
  background: transparent;
  border: none;
  color: var(--text-faint);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.3rem;
  border-radius: 50%;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.task-delete:hover {
  color: var(--danger);
  background: rgba(248, 113, 113, 0.1);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-faint);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

/* ---------- Contact ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
  height: fit-content;
}

.contact-info-item {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  margin-bottom: 1.3rem;
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-item .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.form-status {
  margin-top: 1rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.form-status.show {
  display: block;
  animation: slideIn 0.35s var(--ease);
}

.form-status.success {
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.35);
  color: var(--success);
}

.form-status.error {
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: var(--danger);
}

/* ---------- Media (audio player) ---------- */
.media-block {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.3rem;
  margin-top: 1rem;
}

.media-block audio {
  width: 100%;
  height: 36px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-photo-corner {
    position: static;
    margin: 0 auto 1.5rem;
    width: 150px;
    height: 150px;
  }
}

@media (max-width: 900px) {
  .hero p.lead {
    max-width: none;
    margin-inline: auto;
  }

  .about-grid,
  .contact-layout,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .planner-layout {
    grid-template-columns: 1fr;
  }

  .planner-form {
    position: static;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1.2rem;
    transform: translateY(-130%);
    opacity: 0;
    transition: transform 0.35s var(--ease), opacity 0.3s var(--ease);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-toggle {
    display: flex;
  }
}