@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Fraunces:opsz,wght@9..144,700&display=swap");

:root {
  /* Refined Color Palette */
  --bg-body: #f1f5f9;
  --primary: #6366f1;    
  --primary-dark: #4338ca;
  --secondary: #06b6d4;  
  --accent: #f43f5e;     
  --text-main: #0f172a;  
  --text-muted: #475569; 
  --bg-main: #f1f5f9;    
  --white: #ffffff;
  --stroke: rgba(226, 232, 240, 0.8);
  --glass: rgba(255, 255, 255, 0.7);
  --bg-photo: url("https://images.unsplash.com/photo-1750157815846-d51ccaf99b42?auto=format&fit=crop&w=2000&q=80");
  --bg-overlay: linear-gradient(135deg, rgba(15, 23, 42, 0.72) 0%, rgba(15, 23, 42, 0.45) 55%, rgba(15, 23, 42, 0.7) 100%);
  
  /* Typography Scale */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.75rem;
  --fs-xl: 3rem;
  
  /* Consistent Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;

  --radius: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.05), 0 10px 10px -5px rgba(0,0,0,0.02);
}

[data-theme="dark"] {
  --bg-body: #0f172a;
  --bg-main: #1e293b;
  --white: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --stroke: #334155;
  --glass: rgba(15, 23, 42, 0.8);
  --bg-overlay: linear-gradient(135deg, rgba(2, 6, 23, 0.85) 0%, rgba(2, 6, 23, 0.6) 60%, rgba(2, 6, 23, 0.9) 100%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-body);
  background-image:
    var(--bg-overlay),
    var(--bg-photo);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  scroll-behavior: smooth;
  line-height: 1.7;
  min-height: 100vh;
}

h1, h2, h3 {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(135deg, #1a3a5f 0%, #0e2137 100%);
  color: white;
  padding: 12px 0;
  border-bottom: 3px solid #f39c12;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.topbar .brand {
  color: white;
}

.topbar .brand span {
  color: #bdc3c7;
}

.brand {
  font-size: 1.15rem;
  color: var(--primary-dark);
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand span {
  font-size: var(--fs-xs);
  color: var(--primary);
  font-weight: 600;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

nav a {
  text-decoration: none;
  color: #ecf0f1;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 8px;
  background: transparent;
  transition: all 0.2s ease;
}

#logoutBtn {
  display: none; /* Initially hidden, app.js will show if logged in */
  margin-top: var(--space-sm);
}

nav a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #f39c12;
}

nav a.active {
  background: rgba(255, 255, 255, 0.2);
  color: #f39c12 !important;
  box-shadow: inset 0 -2px 0 #f39c12;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #ffffff;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.2);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 0.75rem var(--space-sm) 1rem;
  background: rgba(14, 33, 55, 0.98);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-nav a {
  text-decoration: none;
  color: #ecf0f1;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 14px;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.mobile-nav a:hover,
.mobile-nav a.active {
  background: rgba(255, 255, 255, 0.12);
  color: #f39c12;
}

.theme-toggle {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--stroke);
  color: white;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: transform 0.2s;
}

.theme-toggle:hover {
  transform: rotate(15deg) scale(1.1);
  background: rgba(255, 255, 255, 0.2);
}

.nav-search {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid var(--stroke);
}

.nav-search input {
  border: none;
  background: transparent;
  outline: none;
  color: white;
  font-size: var(--fs-sm);
  min-width: 160px;
  flex: 1 1 auto;
}

.nav-search input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.nav-search .nav-search-btn {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  font-size: var(--fs-xs);
  font-weight: 600;
  box-shadow: none;
  filter: none;
}

.nav-search .nav-search-btn:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.3);
  box-shadow: none;
  filter: none;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-sm);
}

section {
  margin-bottom: var(--space-xl);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: 2.5rem;
  background: var(--glass);
  backdrop-filter: blur(12px);
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow-md);
  width: fit-content;
}

.section-title h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 800;
}

.section-title::before {
  content: "";
  width: 6px;
  height: 28px;
  border-radius: 999px;
  background: var(--secondary);
}

#home {
  margin-bottom: var(--space-sm); /* Significantly reduced gap after hero */
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-lg);
  align-items: center;
  padding-top: var(--space-md);
  padding-bottom: 0; /* Removed bottom padding to bring next section closer to buttons */
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  line-height: 1.1;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.hero p {
  font-size: var(--fs-md);
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-card {
  background: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: var(--space-md);
  box-shadow: var(--shadow-lg);
}

.hero-card p:last-of-type {
  margin-top: 16px;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  padding: var(--space-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.card p {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  margin-bottom: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.cta-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-md);
  align-items: center;
}

button, .btn {
  padding: 0.6rem 1.25rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: var(--fs-sm);
  background: var(--text-main);
  color: var(--white);
  border: none;
  text-decoration: none;
  transition: all 0.3s ease;
}


button:hover, .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  filter: brightness(1.1);
}

/* Unique Button Colors */

.btn-trial { background: #6366f1; color: white; }      /* Indigo */
.btn-browse { background: #10b981; color: white; }     /* Emerald */
.btn-login { background: #2563eb; color: white; }      /* Blue */
.btn-logout { background: #f43f5e; color: white; }     /* Rose */
.btn-pay { background: #16a34a; color: white; }        /* Safaricom Green */
.btn-upload { background: #06b6d4; color: white; }     /* Cyan */
.btn-copy { background: #f59e0b; color: white; }       /* Amber */
.btn-open { background: #4f46e5; color: white; }       /* Violet */
.btn-close { background: #334155; color: white; }      /* Slate */
.btn-approve { background: #22c55e; color: white; }    /* Bright Green */
.btn-reject { background: #ef4444; color: white; }     /* Red */
.btn-demo { 
  background: #f8fafc; 
  color: #64748b; 
  border: 1px solid #cbd5e1; 
}
.btn-demo:hover {
  background: #f1f5f9;
  color: #475569;
}

.btn.loading {
  color: transparent !important;
  position: relative;
  pointer-events: none;
}

.btn.loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  top: calc(50% - 9px);
  left: calc(50% - 9px);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 0.6s linear infinite;
}

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

/* Deprecated utility classes replaced by semantic ones */
.btn-secondary { background: var(--primary); color: var(--white); }
.btn-ghost { background: transparent; color: var(--primary); border: 1px solid var(--primary); }

label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  font-size: 14px;
}

input, select, textarea {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--stroke);
  font-size: var(--fs-sm);
  background: var(--white);
  transition: all 0.2s ease;
}

.card input, .card select, .card textarea {
  width: 100%;
  margin-bottom: var(--space-xs);
}

input[type="file"] {
  padding: 6px;
  cursor: pointer;
}

input[type="file"]::file-selector-button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--stroke);
  background: var(--bg-main);
  color: var(--text-muted);
  font-weight: 600;
  font-size: var(--fs-xs);
  cursor: pointer;
  margin-right: 15px;
  transition: all 0.2s ease;
}

input[type="file"]::file-selector-button:hover {
  background: var(--stroke);
  border-color: var(--primary);
  color: var(--primary);
}

.password-wrapper {
  position: relative;
  width: 100%;
  margin-bottom: var(--space-xs);
}

.password-wrapper input {
  margin-bottom: 0 !important;
  padding-right: 45px !important;
}

.toggle-password {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent !important;
  border: none !important;
  color: var(--text-muted) !important;
  padding: 0 !important;
  cursor: pointer;
  box-shadow: none !important;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  transition: transform 0.2s ease;
}

.toggle-password:hover {
  transform: translateY(-50%) scale(1.1) !important;
  filter: none !important;
  box-shadow: none !important;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.library-toolbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin-bottom: 16px;
}

.library-search {
  display: flex;
  align-items: center;
  gap: 8px;
}

.library-search input {
  flex: 1 1 auto;
  min-width: 0;
}

.library-search .library-search-btn,
.library-toolbar .clear-filters-btn {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: var(--bg-main);
  color: var(--text-muted);
  font-weight: 600;
  font-size: var(--fs-xs);
  box-shadow: none;
  filter: none;
}

.library-search .library-search-btn:hover,
.library-toolbar .clear-filters-btn:hover {
  background: var(--stroke);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: none;
  filter: none;
}

.search-hint {
  margin: 8px 0 0;
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.paper-card {
  position: relative;
  overflow: hidden;
  justify-content: space-between;
}

.paper-card .lock {
  background: var(--text-main);
  color: var(--white);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: var(--fs-xs);
  font-weight: 700;
}

.badge {
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 999px;
  width: fit-content;
  margin-bottom: var(--space-xs);
}

.paper-meta {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: auto;
  margin-bottom: var(--space-sm);
}

.pill {
  background: var(--bg-main);
  color: var(--primary-dark);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: var(--fs-sm);
  font-weight: 600;
  display: inline-block;
}

.metric {
  color: var(--primary);
  font-size: var(--fs-xl);
  line-height: 1;
}

.status {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: var(--fs-xs);
  font-weight: 600;
  background: var(--stroke);
}

.status.active {
  background: rgba(16, 185, 129, 0.1);
  color: var(--secondary);
}

.status.expired {
  background: rgba(216, 140, 98, 0.2);
  color: #7c2d12;
}

.notice {
  background: rgba(244, 196, 95, 0.2);
  border: 1px solid rgba(244, 196, 95, 0.5);
  color: #7a4b1e;
  padding: 12px 16px;
  border-radius: 12px;
  margin-top: 12px;
  font-weight: 600;
  display: none;
}

.viewer-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 31, 26, 0.7);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 3000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.viewer-shell {
  background: var(--white);
  width: min(1000px, 95vw);
  height: 85vh;
  border-radius: 18px;
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transform: scale(0.95);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.viewer-modal[style*="flex"] .viewer-shell {
  transform: scale(1);
}

.viewer-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--stroke);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.viewer-frame {
  position: relative;
  background: #525659;
}

.viewer-frame iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.watermark {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(15, 61, 46, 0.12) 0, rgba(15, 61, 46, 0.12) 2px, transparent 2px, transparent 28px);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.watermark span {
  position: absolute;
  font-size: 22px;
  font-weight: 700;
  color: rgba(15, 61, 46, 0.2);
  transform: rotate(-18deg);
  top: 40%;
  left: 12%;
}
.main-footer {
  background: #f6f6f6e1;
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 1rem 0 0.75rem 0;
  margin-top: var(--space-xl);
  border-top: 1px solid #a42582;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 0.75rem;
  padding: 0 var(--space-sm);
}

.footer-brand p {
  margin-top: 0.6rem;
  color: #94a3b8;
  line-height: 1.6;
  max-width: 320px;
}

.footer-links h4 {
  margin-top: 0;
  margin-bottom: 4px;
  font-family: inherit;
  font-size: 0.85rem;
  color: #2c3e50;
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 1rem auto 0;
  padding-top: 0.6rem;
  border-top: 1px solid #eee;
  text-align: center;
  color: #64748b;
  opacity: 0.8;
}

.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--text-main);
  color: #fff;
  border-radius: 12px;
  padding: 12px 24px;
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 4000;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}


/* Animation Utility */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

@keyframes pulse-subtle {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.02);
  }
}


/* Media query for mobile devices */
@media (max-width: 900px) {
  body {
    background-attachment: scroll;
    background-position: center top;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 1.5rem;
    padding-bottom: 0;
  }

  /* Reorder auth cards on mobile: Login first, then Create Account */
  #auth .split .card:nth-child(1) { order: 2; } /* Create Account card */
  #auth .split .card:nth-child(2) { order: 1; } /* Login card */
  #auth .split .card:nth-child(3) { order: 3; } /* Current Access card */

  .library-toolbar {
    grid-template-columns: 1fr;
  }

  .library-search {
    flex-direction: column;
    align-items: stretch;
  }

  .library-search-btn,
  .clear-filters-btn {
    width: 100%;
  }


  .nav-search {
    width: 100%;
    margin-top: var(--space-xs);
  }


  .nav-search input {
    min-width: 0;
    width: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .primary-nav {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .topbar-inner {
    gap: var(--space-sm);
  }

  .nav-search {
    order: 4;
    flex: 1 1 100%;
    margin-left: 0;
  }

  .theme-toggle {
    order: 3;
  }

  .nav-toggle {
    order: 2;
  }

  .mobile-nav.open {
    display: flex;
  }
}

@media (max-width: 768px) {
  .main-footer {
    font-size: 0.68rem;
    padding: 0.75rem 0 0.5rem 0;
  }

  .footer-grid {
    gap: 0.5rem;
  }

  .footer-brand p {
    margin-top: 0.4rem;
    line-height: 1.5;
    max-width: 100%;
  }

  .footer-links h4 {
    font-size: 0.78rem;
  }

  .footer-links a {
    font-size: 0.72rem;
  }

  .footer-bottom {
    margin-top: 0.75rem;
    padding-top: 0.5rem;
  }
}