/* ============================================
   SaiAperto.ai — Styles
   ============================================ */

/* === RESET & VARIABLES === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{
  --bg:#0a0f1c;
  --bg-secondary:#111827;
  --card-bg:rgba(255,255,255,0.05);
  --border:rgba(255,255,255,0.1);
  --text:#f1f5f9;
  --text-secondary:rgba(255,255,255,0.6);
  --primary:#10b981;
  --primary-hover:#059669;
  --primary-glow:rgba(16,185,129,0.3);
  --danger:#ef4444;
  --warning:#f59e0b;
  --sidebar-w:260px;
  --topbar-h:60px;
  --radius:12px;
}

html{font-size:16px;}
body{
  font-family:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  overflow-x:hidden;
}

/* === SCROLLBAR === */
::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.15);border-radius:3px;}

/* === LOADING SCREEN === */
.loading-screen{
  position:fixed;inset:0;z-index:9999;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg);
}
.loading-content{text-align:center;}
.loading-spinner{
  width:48px;height:48px;border:3px solid rgba(255,255,255,0.1);
  border-top-color:var(--primary);border-radius:50%;
  animation:spin .8s linear infinite;margin:0 auto 16px;
}
@keyframes spin{to{transform:rotate(360deg);}}
.loading-content h2{font-size:24px;margin-bottom:8px;background:linear-gradient(135deg,#10b981,#34d399);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.loading-content p{color:var(--text-secondary);font-size:14px;}

/* === AUTH SCREEN === */
.auth-screen{
  position:fixed;inset:0;z-index:9998;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg);
}
.auth-container{
  width:100%;max-width:400px;padding:24px;
}
.auth-header{text-align:center;margin-bottom:32px;}
.auth-header h1{font-size:28px;background:linear-gradient(135deg,#10b981,#34d399);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px;}
.auth-header p{color:var(--text-secondary);font-size:14px;}
.auth-form .form-group{margin-bottom:16px;}
.auth-toggle{text-align:center;margin-top:16px;font-size:14px;color:var(--text-secondary);}
.auth-toggle a{color:var(--primary);text-decoration:none;font-weight:600;}

/* === ONBOARDING === */
.onboarding-screen{
  position:fixed;inset:0;z-index:9997;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg);
}
.onboarding-container{width:100%;max-width:460px;padding:24px;text-align:center;}
.onboarding-container h1{font-size:26px;margin-bottom:8px;color:var(--text);}
.onboarding-container>p{color:var(--text-secondary);margin-bottom:24px;}
.onboarding-container .form-group{text-align:left;margin-bottom:16px;}

/* === FORMS === */
.form-group{margin-bottom:14px;}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:6px;}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:10px 14px;background:rgba(255,255,255,0.06);
  border:1px solid var(--border);border-radius:8px;color:var(--text);
  font-size:14px;outline:none;transition:border .2s;
}
.form-group input:focus,.form-group select:focus{border-color:var(--primary);}
.form-group select option{background:#1f2937;color:#fff;}

/* === BUTTONS === */
.btn-primary{
  background:linear-gradient(135deg,#10b981,#059669);color:#fff;
  border:none;padding:10px 20px;border-radius:8px;font-size:14px;
  font-weight:600;cursor:pointer;transition:all .2s;display:inline-flex;
  align-items:center;gap:6px;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 15px var(--primary-glow);}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-outline{
  background:transparent;color:var(--primary);
  border:1px solid var(--primary);padding:10px 20px;border-radius:8px;
  font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;
}
.btn-outline:hover{background:rgba(16,185,129,0.1);}
.btn-danger{
  background:rgba(239,68,68,0.15);color:var(--danger);
  border:1px solid rgba(239,68,68,0.3);padding:10px 20px;border-radius:8px;
  font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;
}
.btn-danger:hover{background:rgba(239,68,68,0.25);}
.btn-full{width:100%;justify-content:center;}
.btn-sm{
  padding:8px 16px;border:none;border-radius:8px;font-size:13px;
  font-weight:600;cursor:pointer;transition:all .2s;flex:1;text-align:center;
}
.btn-payment{background:linear-gradient(135deg,#10b981,#059669);color:#fff;}
.btn-payment:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(16,185,129,0.4);}
.btn-delete{background:rgba(239,68,68,0.15);color:#ef4444;border:1px solid rgba(239,68,68,0.3);}
.btn-delete:hover{background:rgba(239,68,68,0.25);}

/* === APP LAYOUT === */
.app-container{display:flex;min-height:100vh;}

/* SIDEBAR */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);
  background:var(--bg-secondary);border-right:1px solid var(--border);
  display:flex;flex-direction:column;z-index:1000;
  transform:translateX(-100%);transition:transform .3s ease;
}
.sidebar.open{transform:translateX(0);}
.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border);}
.sidebar-header h2{font-size:18px;background:linear-gradient(135deg,#10b981,#34d399);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.sidebar-close{background:none;border:none;color:var(--text-secondary);font-size:24px;cursor:pointer;}
.sidebar-user{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--border);}
.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#10b981,#059669);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;color:#fff;flex-shrink:0;}
.sidebar-username{font-size:14px;font-weight:600;color:var(--text);}
.sidebar-plan{font-size:12px;color:var(--primary);}
.sidebar-nav{flex:1;padding:12px 0;overflow-y:auto;}
.nav-item{
  display:flex;align-items:center;gap:12px;padding:10px 20px;
  color:var(--text-secondary);text-decoration:none;font-size:14px;
  transition:all .2s;border-left:3px solid transparent;
}
.nav-item:hover{background:rgba(255,255,255,0.05);color:var(--text);}
.nav-item.active{color:var(--primary);border-left-color:var(--primary);background:rgba(16,185,129,0.08);}
.nav-item i,.nav-item svg{width:20px;height:20px;}
.btn-logout{
  display:flex;align-items:center;gap:8px;padding:14px 20px;
  background:none;border:none;border-top:1px solid var(--border);
  color:var(--danger);font-size:14px;cursor:pointer;width:100%;
  transition:background .2s;
}
.btn-logout:hover{background:rgba(239,68,68,0.08);}
.btn-logout i,.btn-logout svg{width:18px;height:18px;}

/* OVERLAY */
.sidebar-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:999;
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.sidebar-overlay.active{opacity:1;pointer-events:auto;}

/* MAIN CONTENT */
.main-content{flex:1;min-height:100vh;display:flex;flex-direction:column;}
.top-bar{
  display:flex;align-items:center;gap:12px;padding:12px 20px;
  border-bottom:1px solid var(--border);height:var(--topbar-h);
  background:var(--bg-secondary);position:sticky;top:0;z-index:100;
}
.menu-toggle{background:none;border:none;color:var(--text);cursor:pointer;}
.menu-toggle i,.menu-toggle svg{width:24px;height:24px;}
.top-bar h1{flex:1;font-size:18px;font-weight:600;}
.top-actions{display:flex;align-items:center;gap:12px;}
.save-indicator{font-size:12px;color:var(--primary);animation:pulse 1.5s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}

/* === PAGES === */
.page{display:none;padding:20px;max-width:900px;width:100%;margin:0 auto;animation:fadeIn .3s ease;}
.page.active{display:block;}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}
.page-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:8px;}
.page-desc{color:var(--text-secondary);font-size:14px;margin-bottom:20px;}

/* GREETING */
.greeting{margin-bottom:20px;}
.greeting h2{font-size:22px;margin-bottom:4px;}
.greeting p{color:var(--text-secondary);font-size:14px;}

/* STATS GRID */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:20px;}
.stat-card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;text-align:center;
}
.stat-label{display:block;font-size:12px;color:var(--text-secondary);margin-bottom:6px;}
.stat-value{display:block;font-size:20px;font-weight:700;color:var(--text);}

/* CARDS */
.card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;margin-bottom:16px;
}
.card h3{font-size:16px;margin-bottom:12px;color:var(--text);}
.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-bottom:16px;}

/* SCORE */
.score-display{text-align:center;margin-bottom:12px;}
.score-number{font-size:48px;font-weight:800;background:linear-gradient(135deg,#10b981,#34d399);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.score-max{display:block;font-size:13px;color:var(--text-secondary);}

/* PROGRESS BAR */
.progress-bar{height:8px;background:rgba(255,255,255,0.08);border-radius:4px;overflow:hidden;}
.progress-fill{height:100%;background:linear-gradient(90deg,#10b981,#34d399);border-radius:4px;transition:width .6s ease;}

/* DEBT CARDS */
.debt-card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;margin-bottom:12px;
}
.debt-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;}
.debt-card-header h3{font-size:16px;font-weight:600;margin:0;color:var(--text);}
.debt-badge{background:var(--primary);color:#fff;padding:2px 10px;border-radius:20px;font-size:12px;font-weight:600;}
.debt-info{display:flex;justify-content:space-between;font-size:14px;color:var(--text-secondary);margin-bottom:10px;}
.debt-card .progress-bar{height:6px;background:rgba(255,255,255,0.1);border-radius:3px;overflow:hidden;margin-bottom:12px;}
.debt-card .progress-fill{height:100%;background:linear-gradient(90deg,#10b981,#34d399);border-radius:3px;transition:width .5s ease;}
.debt-actions{display:flex;gap:8px;}

/* BUDGET CARDS */
.budget-card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;margin-bottom:12px;
}
.budget-header{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.budget-cat-color{width:12px;height:12px;border-radius:50%;flex-shrink:0;}
.budget-header h3{flex:1;font-size:15px;margin:0;color:var(--text);}
.budget-header span:last-child{font-size:13px;color:var(--text-secondary);}

/* UPCOMING */
.upcoming-item{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid rgba(255,255,255,0.05);font-size:14px;color:var(--text);}
.upcoming-item:last-child{border-bottom:none;}

/* ACHIEVEMENTS */
.achievements-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;}
.achievement-card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;text-align:center;transition:all .3s;
}
.achievement-card.locked{opacity:.4;filter:grayscale(1);}
.achievement-card.unlocked{border-color:var(--primary);box-shadow:0 0 15px rgba(16,185,129,0.2);}
.achievement-card i,.achievement-card svg{width:32px;height:32px;margin-bottom:8px;color:var(--primary);}
.achievement-card h4{font-size:14px;margin:0 0 4px;color:var(--text);}
.achievement-card p{font-size:12px;margin:0;color:var(--text-secondary);}

/* LESSONS */
.lessons-list{margin-top:12px;}
.lesson-card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;margin-bottom:10px;display:flex;justify-content:space-between;
  align-items:center;cursor:pointer;transition:all .2s;
}
.lesson-card:hover{border-color:rgba(255,255,255,0.2);transform:translateX(4px);}
.lesson-card.completed{border-color:var(--primary);background:rgba(16,185,129,0.05);}
.lesson-card h4{font-size:14px;margin:0;color:var(--text);}
.lesson-status{font-size:12px;color:var(--text-secondary);white-space:nowrap;}
.lesson-card.completed .lesson-status{color:var(--primary);}
.lesson-body{line-height:1.7;font-size:14px;color:var(--text);}
.lesson-body h4{margin:16px 0 8px;font-size:15px;}
.lesson-body p{margin-bottom:10px;}
.lesson-body ul{margin:0 0 10px 20px;}
.lesson-body li{margin-bottom:4px;}

/* PLANS */
.plans-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;}
.plan-card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;text-align:center;position:relative;transition:all .3s;
}
.plan-card.popular{border-color:var(--primary);box-shadow:0 0 20px rgba(16,185,129,0.15);}
.plan-badge{
  position:absolute;top:-10px;left:50%;transform:translateX(-50%);
  background:var(--primary);color:#fff;padding:2px 12px;border-radius:20px;
  font-size:11px;font-weight:700;
}
.plan-price{font-size:32px;font-weight:800;margin:12px 0;color:var(--text);}
.plan-price span{font-size:14px;font-weight:400;color:var(--text-secondary);}
.plan-features{list-style:none;text-align:left;margin-bottom:20px;}
.plan-features li{padding:6px 0;font-size:14px;color:var(--text);border-bottom:1px solid rgba(255,255,255,0.04);}
.plan-features li::before{content:'✓ ';color:var(--primary);font-weight:700;}
.plan-features li.disabled{color:var(--text-secondary);opacity:.5;}
.plan-features li.disabled::before{content:'✗ ';color:var(--danger);}

/* SETTINGS */
.setting-row{display:flex;justify-content:space-between;align-items:center;gap:16px;}
.setting-desc{font-size:13px;color:var(--text-secondary);margin-top:2px;}
.switch{position:relative;display:inline-block;width:48px;height:26px;}
.switch input{opacity:0;width:0;height:0;}
.slider{
  position:absolute;cursor:pointer;inset:0;background:rgba(255,255,255,0.15);
  border-radius:26px;transition:.3s;
}
.slider::before{
  content:'';position:absolute;height:20px;width:20px;left:3px;bottom:3px;
  background:#fff;border-radius:50%;transition:.3s;
}
.switch input:checked+.slider{background:var(--primary);}
.switch input:checked+.slider::before{transform:translateX(22px);}
.danger-zone{border-color:rgba(239,68,68,0.3);}
.danger-zone h3{color:var(--danger);}

/* CHAT */
.chat-container{display:flex;flex-direction:column;height:calc(100vh - var(--topbar-h) - 40px);max-height:700px;}
.chat-header{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--border);margin-bottom:12px;}
.chat-header h3{margin:0;font-size:16px;}
.chat-status{font-size:12px;color:var(--primary);}
.chat-count{font-size:12px;color:var(--text-secondary);}
.chat-messages{flex:1;overflow-y:auto;padding:8px 0;}
.chat-msg{padding:10px 14px;border-radius:12px;margin-bottom:8px;max-width:85%;font-size:14px;line-height:1.5;}
.chat-msg.user{background:linear-gradient(135deg,#10b981,#059669);color:#fff;margin-left:auto;border-bottom-right-radius:4px;}
.chat-msg.ai{background:rgba(255,255,255,0.08);color:var(--text);border-bottom-left-radius:4px;}
.chat-msg p{margin:0;}
.chat-input-area{display:flex;gap:8px;padding-top:12px;border-top:1px solid var(--border);}
.chat-input-area input{flex:1;}

/* MODAL */
.modal-overlay{
  position:fixed;inset:0;z-index:2000;background:rgba(0,0,0,0.6);
  display:flex;align-items:center;justify-content:center;padding:20px;
}
.modal{
  background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);
  width:100%;max-width:480px;max-height:90vh;overflow-y:auto;
}
.modal-lg{max-width:640px;}
.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border);}
.modal-header h3{margin:0;font-size:18px;}
.modal-close{background:none;border:none;color:var(--text-secondary);font-size:24px;cursor:pointer;}
.modal-body{padding:20px;}
.modal-footer{padding:12px 20px;border-top:1px solid var(--border);text-align:right;}

/* TOAST */
.toast-container{position:fixed;top:20px;right:20px;z-index:3000;display:flex;flex-direction:column;gap:8px;}
.toast{
  padding:12px 20px;border-radius:8px;font-size:14px;color:#fff;
  animation:slideIn .3s ease;box-shadow:0 4px 12px rgba(0,0,0,0.3);
  max-width:340px;
}
.toast.success{background:#059669;}
.toast.error{background:#dc2626;}
.toast.info{background:#2563eb;}
@keyframes slideIn{from{opacity:0;transform:translateX(40px);}to{opacity:1;transform:translateX(0);}}

/* EMPTY STATE */
.empty-state{text-align:center;padding:30px;color:var(--text-secondary);font-size:14px;}

/* === RESPONSIVE === */
@media(min-width:769px){
  .sidebar{transform:translateX(0);}
  .sidebar-close{display:none;}
  .sidebar-overlay{display:none!important;}
  .main-content{margin-left:var(--sidebar-w);}
  .menu-toggle{display:none;}
}
@media(max-width:768px){
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .plans-grid{grid-template-columns:1fr;}
  .achievements-grid{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:400px){
  .stats-grid{grid-template-columns:1fr;}
}