/* ========================================
   PORTFOLIO NOTEBOOK - CSS
   Conceito: Caderno/notebook real com 
   páginas pautadas, sticky notes, 
   espiral e abas coloridas
   ======================================== */

:root {
  --page-bg: #fefdf5;
  --page-line: #c8daf0;
  --page-margin: #f0b0b0;
  --ink-blue: #1a4b8c;
  --ink-dark: #1e1e2e;
  --pencil: #4a4a4a;
  --cover-brown: #5c3d2e;
  --cover-dark: #3d2518;
  --spiral-silver: #b8b8b8;
  --sticky-yellow: #fff8a6;
  --sticky-blue: #a6d8ff;
  --sticky-green: #b4f0b4;
  --sticky-pink: #ffb4c8;
  --tab-active: #e74c3c;
  --python: #3776AB;
  --js: #F7DF1E;
  --csharp: #68217A;
  --ts: #3178C6;
  --docker: #2496ED;
  --html: #e34c26;
  --css: #264de4;
  --db: #336791;
  --shadow: 0 8px 32px rgba(0,0,0,0.18);
  --font-hand: 'Caveat', cursive;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-body);
  background: #2c2c3a;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(120, 80, 200, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(60, 140, 200, 0.06) 0%, transparent 50%);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ========================================
   COVER
   ======================================== */
.cover {
  width: 700px;
  height: 520px;
  perspective: 1200px;
  cursor: pointer;
  animation: coverFloat 4s ease-in-out infinite;
}

@keyframes coverFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.cover-spine {
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 100%;
  background: var(--cover-dark);
  border-radius: 6px 0 0 6px;
  z-index: 2;
}

.cover-front {
  position: absolute;
  left: 25px;
  top: 0;
  width: calc(100% - 25px);
  height: 100%;
  background: linear-gradient(145deg, #7a4e37, var(--cover-brown), #4a2d1c);
  border-radius: 0 12px 12px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow), inset 0 0 60px rgba(0,0,0,0.2);
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: left;
  overflow: hidden;
}

.cover-front::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='100' height='100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23noise)' opacity='0.08'/%3E%3C/svg%3E");
  pointer-events: none;
}

.cover:hover .cover-front {
  transform: rotateY(-8deg);
}

.cover-elastic {
  position: absolute;
  right: 25px;
  top: 0;
  width: 4px;
  height: 100%;
  background: #c0392b;
  border-radius: 2px;
}

.cover-label {
  text-align: center;
  color: #f0e6d4;
  z-index: 1;
}

.cover-label-small {
  font-family: var(--font-hand);
  font-size: 1.1rem;
  opacity: 0.7;
  letter-spacing: 2px;
  text-transform: lowercase;
}

.cover-name {
  font-family: var(--font-hand);
  font-size: 3.5rem;
  font-weight: 700;
  margin: 4px 0;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.cover-label-role {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  opacity: 0.8;
  letter-spacing: 1px;
  background: rgba(0,0,0,0.2);
  padding: 4px 16px;
  border-radius: 12px;
}

.cover-sticker {
  position: absolute;
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: rgba(255,255,255,0.6);
  bottom: 80px;
  left: 60px;
  transform: rotate(-15deg);
}

.sticker-2 {
  left: auto !important;
  right: 80px;
  bottom: 120px !important;
  transform: rotate(10deg) !important;
}

.sticker-3 {
  left: 120px !important;
  bottom: 130px !important;
  transform: rotate(5deg) !important;
}

.cover-open-btn {
  position: absolute;
  bottom: 24px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: #f0e6d4;
  padding: 10px 28px;
  border-radius: 25px;
  font-family: var(--font-hand);
  font-size: 1.1rem;
  cursor: pointer;
  z-index: 1;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cover-open-btn:hover {
  background: rgba(255,255,255,0.25);
  transform: scale(1.05);
}

.cover-open-btn i {
  transition: transform 0.3s;
}

.cover-open-btn:hover i {
  transform: translateX(4px);
}

/* ========================================
   NOTEBOOK
   ======================================== */
.notebook {
  width: 900px;
  min-height: 650px;
  background: var(--page-bg);
  border-radius: 4px 12px 12px 4px;
  box-shadow: var(--shadow),
    -4px 0 0 #e8e0d0,
    -8px 0 0 #ddd5c5;
  position: relative;
  display: flex;
  animation: bookOpen 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.notebook.hidden {
  display: none;
}

@keyframes bookOpen {
  from {
    opacity: 0;
    transform: perspective(1200px) rotateY(60deg) scale(0.7);
  }
  to {
    opacity: 1;
    transform: perspective(1200px) rotateY(0) scale(1);
  }
}

/* Spiral */
.spiral {
  position: absolute;
  left: -18px;
  top: 20px;
  bottom: 20px;
  width: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  z-index: 10;
}

.spiral-ring {
  width: 36px;
  height: 22px;
  border: 3px solid var(--spiral-silver);
  border-radius: 50%;
  background: transparent;
  box-shadow: 1px 1px 2px rgba(0,0,0,0.15);
}

/* Tabs */
.tabs {
  position: absolute;
  right: -48px;
  top: 30px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 5;
}

.tab {
  width: 48px;
  height: 56px;
  border: none;
  border-radius: 0 8px 8px 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 0.6rem;
  font-family: var(--font-body);
  font-weight: 600;
  color: #fff;
  transition: all 0.3s;
  box-shadow: 2px 2px 4px rgba(0,0,0,0.15);
}

.tab:nth-child(1) { background: #e74c3c; }
.tab:nth-child(2) { background: #3498db; }
.tab:nth-child(3) { background: #2ecc71; }
.tab:nth-child(4) { background: #f39c12; }

.tab.active {
  width: 56px;
  box-shadow: 3px 3px 8px rgba(0,0,0,0.25);
}

.tab i { font-size: 1rem; }
.tab span { font-size: 0.55rem; letter-spacing: 0.5px; }

/* Page Container */
.page-container {
  flex: 1;
  padding: 20px 40px 20px 60px;
  position: relative;
  overflow-y: auto;
  max-height: 650px;
}

.page-container::-webkit-scrollbar { width: 6px; }
.page-container::-webkit-scrollbar-track { background: transparent; }
.page-container::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }

/* Page */
.page {
  display: none;
  position: relative;
  min-height: 100%;
  animation: pageFlip 0.4s ease;
}

.page.active { display: block; }

@keyframes pageFlip {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Page lines */
.page-lines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    transparent,
    transparent 31px,
    var(--page-line) 31px,
    var(--page-line) 32px
  );
  pointer-events: none;
  opacity: 0.5;
}

.page-margin {
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--page-margin);
  opacity: 0.6;
  pointer-events: none;
}

.page-content {
  position: relative;
  z-index: 1;
  padding-left: 16px;
}

/* Handwritten headers */
.handwritten-header h2 {
  font-family: var(--font-hand);
  font-size: 2.2rem;
  color: var(--ink-blue);
  font-weight: 700;
}

.underline-sketch {
  width: 120px;
  height: 4px;
  background: var(--ink-blue);
  border-radius: 2px;
  margin-top: 2px;
  margin-bottom: 20px;
  opacity: 0.5;
  transform: rotate(-0.5deg);
}

.handwritten {
  font-family: var(--font-hand) !important;
}

/* ========================================
   ABOUT PAGE
   ======================================== */
.profile-card {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.profile-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--ink-blue);
  flex-shrink: 0;
  box-shadow: 3px 3px 8px rgba(0,0,0,0.15);
}

.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-info h3 {
  font-size: 1.8rem;
  color: var(--ink-blue);
  margin-bottom: 8px;
}

.typed-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--pencil);
  margin-bottom: 16px;
}

/* Sticky Notes */
.sticky-note {
  padding: 16px 20px;
  border-radius: 2px;
  position: relative;
  box-shadow: 2px 3px 8px rgba(0,0,0,0.12);
  transform: rotate(-1deg);
  max-width: 280px;
}

.sticky-note.yellow { background: var(--sticky-yellow); }
.sticky-note.blue { background: var(--sticky-blue); }
.sticky-note.green { background: var(--sticky-green); }
.sticky-note.pink { background: var(--sticky-pink); }

.sticky-pin {
  position: absolute;
  top: -6px;
  left: 50%;
  width: 14px;
  height: 14px;
  background: radial-gradient(circle at 40% 40%, #e74c3c, #c0392b);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
  transform: translateX(-50%);
}

.sticky-note p {
  font-size: 0.85rem;
  margin: 4px 0;
  color: #333;
}

.sticky-note a {
  color: var(--ink-blue);
  text-decoration: none;
  font-weight: 500;
}

.sticky-note a:hover { text-decoration: underline; }

/* Stats */
.stats-row {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

.stat-card {
  flex: 1;
  text-align: center;
  padding: 16px;
  background: #fff;
  position: relative;
}

.doodle-border {
  border: 2px solid var(--pencil);
  border-radius: 4px;
  box-shadow: 3px 3px 0 var(--pencil);
}

.stat-number {
  display: block;
  font-family: var(--font-hand);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--ink-blue);
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--pencil);
}

/* ========================================
   PROJECTS PAGE
   ======================================== */
.filter-row {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 6px 16px;
  border: 2px solid var(--pencil);
  border-radius: 20px;
  background: transparent;
  font-family: var(--font-hand);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--pencil);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--ink-blue);
  color: #fff;
  border-color: var(--ink-blue);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.project-card {
  background: #fff;
  border: 1px solid #e0d8cc;
  border-radius: 4px;
  padding: 16px;
  position: relative;
  transition: all 0.3s;
  box-shadow: 2px 2px 6px rgba(0,0,0,0.06);
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: 4px 6px 16px rgba(0,0,0,0.12);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  border-radius: 4px 0 0 4px;
}

.project-card[data-lang="Python"]::before { background: var(--python); }
.project-card[data-lang="JavaScript"]::before { background: var(--js); }
.project-card[data-lang="C#"]::before { background: var(--csharp); }
.project-card[data-lang="TypeScript"]::before { background: var(--ts); }
.project-card[data-lang="HTML"]::before { background: var(--html); }

.project-name {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-blue);
  margin-bottom: 6px;
}

.project-desc {
  font-size: 0.82rem;
  color: var(--pencil);
  line-height: 1.5;
  margin-bottom: 10px;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  color: #888;
}

.project-lang {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.project-link {
  margin-left: auto;
  color: var(--ink-blue);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.8rem;
}

.project-link:hover {
  text-decoration: underline;
}

/* Loading */
.loading-sketch {
  text-align: center;
  padding: 40px;
  color: var(--pencil);
}

.pencil-loader {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  border: 3px solid #e0d8cc;
  border-top-color: var(--ink-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ========================================
   SKILLS PAGE
   ======================================== */
.skills-notebook {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.skill-category {
  padding-bottom: 16px;
  border-bottom: 1px dashed #ccc;
}

.category-title {
  font-family: var(--font-hand);
  font-size: 1.4rem;
  color: var(--ink-blue);
  margin-bottom: 12px;
}

.category-title i {
  margin-right: 8px;
  opacity: 0.7;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 5px 14px;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
  color: #fff;
  box-shadow: 1px 2px 4px rgba(0,0,0,0.15);
}

.skill-tag.python { background: var(--python); }
.skill-tag.js { background: #d4a017; color: #333; }
.skill-tag.ts { background: var(--ts); }
.skill-tag.csharp { background: var(--csharp); }
.skill-tag.docker { background: var(--docker); }
.skill-tag.html { background: var(--html); }
.skill-tag.css { background: var(--css); }
.skill-tag.db { background: var(--db); }

/* ========================================
   CONTACT PAGE
   ======================================== */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.contact-card {
  text-align: center;
  padding: 24px 16px;
  text-decoration: none;
  color: #333;
  transition: transform 0.3s;
  cursor: pointer;
}

.contact-card:hover {
  transform: rotate(0deg) scale(1.05) !important;
}

.contact-card:nth-child(1) { transform: rotate(-2deg); }
.contact-card:nth-child(2) { transform: rotate(1deg); }
.contact-card:nth-child(3) { transform: rotate(-1.5deg); }

.contact-card h3 {
  font-family: var(--font-hand);
  font-size: 1.3rem;
  margin: 8px 0 4px;
}

.contact-card p {
  font-size: 0.8rem;
}

.contact-card i {
  opacity: 0.8;
}

/* Torn paper */
.torn-paper-note {
  background: #f5f0e0;
  padding: 24px 32px;
  margin-top: 20px;
  position: relative;
  box-shadow: 2px 3px 8px rgba(0,0,0,0.1);
  transform: rotate(-0.5deg);
}

.torn-paper-note::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  width: 100%;
  height: 8px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 8'%3E%3Cpath d='M0,4 Q10,0 20,4 Q30,8 40,4 Q50,0 60,4 Q70,8 80,4 Q90,0 100,4 Q110,8 120,4 Q130,0 140,4 Q150,8 160,4 Q170,0 180,4 Q190,8 200,4 Q210,0 220,4 Q230,8 240,4 Q250,0 260,4 Q270,8 280,4 Q290,0 300,4 Q310,8 320,4 Q330,0 340,4 Q350,8 360,4 Q370,0 380,4 Q390,8 400,4 Q410,0 420,4 Q430,8 440,4 Q450,0 460,4 Q470,8 480,4 Q490,0 500,4 Q510,8 520,4 Q530,0 540,4 Q550,8 560,4 Q570,0 580,4 Q590,8 600,4 Q610,0 620,4 Q630,8 640,4 Q650,0 660,4 Q670,8 680,4 Q690,0 700,4 Q710,8 720,4 Q730,0 740,4 Q750,8 760,4 Q770,0 780,4 Q790,8 800,4 Q810,0 820,4 Q830,8 840,4 Q850,0 860,4 Q870,8 880,4 Q890,0 900,4 Q910,8 920,4 Q930,0 940,4 Q950,8 960,4 Q970,0 980,4 Q990,8 1000,4 Q1010,0 1020,4 Q1030,8 1040,4 Q1050,0 1060,4 Q1070,8 1080,4 Q1090,0 1100,4 Q1110,8 1120,4 Q1130,0 1140,4 Q1150,8 1160,4 Q1170,0 1180,4 Q1190,8 1200,4' fill='none' stroke='%23f5f0e0' stroke-width='8'/%3E%3C/svg%3E");
}

.torn-paper-note p {
  font-size: 1.4rem;
  color: var(--ink-blue);
  font-style: italic;
  line-height: 1.6;
}

.signature {
  display: block;
  text-align: right;
  font-family: var(--font-hand);
  font-size: 1.2rem;
  color: var(--pencil);
  margin-top: 8px;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1000px) {
  .notebook {
    width: 95vw;
    margin-left: 20px;
  }
  .tabs {
    right: -40px;
  }
}

@media (max-width: 768px) {
  .cover {
    width: 90vw;
    height: 420px;
  }
  .cover-name { font-size: 2.5rem; }
  
  .notebook {
    width: 92vw;
    min-height: auto;
    flex-direction: column;
  }
  
  .spiral { display: none; }
  
  .tabs {
    position: relative;
    right: auto;
    top: auto;
    flex-direction: row;
    padding: 8px 16px;
    background: #f0ece0;
    border-bottom: 1px solid #ddd;
    border-radius: 4px 12px 0 0;
  }
  
  .tab {
    width: auto;
    height: auto;
    padding: 8px 12px;
    border-radius: 8px;
    flex-direction: row;
    gap: 4px;
  }
  
  .tab span { font-size: 0.65rem; }
  .tab.active { width: auto; }
  
  .page-container {
    padding: 16px 20px;
    max-height: none;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-cards {
    grid-template-columns: 1fr;
  }
  
  .profile-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}