/* =============================================
   DueTrack v2.0 — Stylesheet
   Dark-first, fully responsive
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* === CSS Variables === */
:root {
  --bg:          #0f1117;
  --bg-card:     #1a1d2e;
  --bg-card2:    #222538;
  --border:      #2e3150;
  --accent:      #6c63ff;
  --accent-l:    #8b85ff;
  --accent-dim:  rgba(108,99,255,0.15);
  --green:       #22c55e;
  --green-dim:   rgba(34,197,94,0.12);
  --red:         #ef4444;
  --red-dim:     rgba(239,68,68,0.12);
  --yellow:      #f59e0b;
  --yellow-dim:  rgba(245,158,11,0.12);
  --text:        #e2e8f0;
  --text-muted:  #8892a4;
  --text-dim:    #4a5568;
  --sidebar-w:   240px;
  --radius:      12px;
  --shadow:      0 4px 24px rgba(0,0,0,0.4);
  --font:        'Sora', sans-serif;
  --mono:        'JetBrains Mono', monospace;
  --t:           0.2s ease;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:15px;scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--accent-l);text-decoration:none}
a:hover{color:var(--accent)}
input,select,textarea,button{font-family:var(--font);font-size:0.9rem}

/* === Auth Pages === */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);position:relative;overflow:hidden}
.auth-wrap::before{content:'';position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(108,99,255,0.12) 0%,transparent 70%);top:-200px;right:-200px;pointer-events:none}
.auth-wrap::after{content:'';position:absolute;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(34,197,94,0.07) 0%,transparent 70%);bottom:-100px;left:-100px;pointer-events:none}
.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:20px;padding:2.5rem 2rem;width:100%;max-width:420px;position:relative;z-index:1;box-shadow:var(--shadow)}
.auth-logo{text-align:center;margin-bottom:2rem}
.auth-logo .logo-mark{width:56px;height:56px;background:var(--accent-dim);border:1px solid var(--accent);border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-size:1.8rem;margin-bottom:0.75rem}
.auth-logo h1{font-size:1.6rem;font-weight:700;letter-spacing:-0.03em}
.auth-logo p{font-size:0.8rem;color:var(--text-muted);margin-top:0.2rem}

/* === Forms === */
.form-group{margin-bottom:1.1rem}
.form-group label{display:block;font-size:0.78rem;font-weight:600;color:var(--text-muted);letter-spacing:0.06em;text-transform:uppercase;margin-bottom:0.4rem}
.form-group input,.form-group select,.form-group textarea{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:0.65rem 0.9rem;color:var(--text);transition:border-color var(--t),box-shadow var(--t);outline:none}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}
.form-group select option{background:var(--bg-card2)}
.form-group textarea{resize:vertical;min-height:80px}
.form-group input:disabled{opacity:0.5;cursor:not-allowed}

/* Password eye toggle */
.input-eye-wrap{position:relative}
.input-eye-wrap input{padding-right:2.8rem}
.eye-btn{position:absolute;right:0.7rem;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;color:var(--text-muted);font-size:1rem;padding:0.2rem;line-height:1;transition:color var(--t)}
.eye-btn:hover{color:var(--text)}

/* === Buttons === */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;padding:0.6rem 1.2rem;border-radius:8px;font-size:0.875rem;font-weight:600;cursor:pointer;border:none;transition:all var(--t);white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-l);transform:translateY(-1px)}
.btn-success{background:var(--green);color:#fff}
.btn-success:hover{opacity:0.9;transform:translateY(-1px)}
.btn-danger{background:var(--red);color:#fff}
.btn-danger:hover{opacity:0.9}
.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--bg-card2);color:var(--text)}
.btn-sm{padding:0.35rem 0.7rem;font-size:0.78rem}
.btn-full{width:100%}
.btn:disabled{opacity:0.6;cursor:not-allowed;transform:none}

/* === Layout === */
.app-layout{display:flex;min-height:100vh}

/* === Sidebar === */
.sidebar{width:var(--sidebar-w);background:var(--bg-card);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;transition:transform var(--t);overflow-y:auto}
.sidebar-logo{padding:1.5rem 1.2rem 1rem;border-bottom:1px solid var(--border)}
.logo-row{display:flex;align-items:center;gap:0.75rem}
.logo-icon{width:38px;height:38px;background:var(--accent-dim);border:1px solid var(--accent);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
.sidebar-logo h2{font-size:1.1rem;font-weight:700;letter-spacing:-0.02em}
.sidebar-logo small{display:block;font-size:0.7rem;color:var(--text-muted);margin-top:0.1rem}
.sidebar-user{padding:0.9rem 1.2rem;border-bottom:1px solid var(--border)}
.user-name{font-size:0.85rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user-biz{font-size:0.72rem;color:var(--text-muted);margin-top:0.1rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-nav{flex:1;padding:1rem 0.75rem}
.nav-label{font-size:0.65rem;font-weight:700;letter-spacing:0.1em;color:var(--text-dim);text-transform:uppercase;padding:0 0.5rem;margin:0.75rem 0 0.4rem}
.nav-link{display:flex;align-items:center;gap:0.7rem;padding:0.6rem 0.75rem;border-radius:8px;font-size:0.875rem;font-weight:500;color:var(--text-muted);transition:all var(--t);margin-bottom:0.15rem;text-decoration:none}
.nav-link:hover{background:var(--bg-card2);color:var(--text)}
.nav-link.active{background:var(--accent-dim);color:var(--accent-l);border:1px solid rgba(108,99,255,0.2)}
.nav-icon{font-size:1rem;width:20px;text-align:center}
.sidebar-footer{padding:1rem 0.75rem;border-top:1px solid var(--border)}

/* === Main === */
.main-content{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-height:100vh}
.topbar{background:var(--bg-card);border-bottom:1px solid var(--border);padding:0.9rem 1.5rem;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:50;gap:0.75rem}
.topbar-title{font-size:1.1rem;font-weight:700;letter-spacing:-0.02em;flex:1}
.hamburger{display:none;background:none;border:none;color:var(--text);cursor:pointer;font-size:1.3rem;padding:0.3rem}
.page-content{padding:1.5rem;flex:1}

/* === Cards === */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}
.summary-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.2rem 1.4rem;position:relative;overflow:hidden;transition:transform var(--t),box-shadow var(--t)}
.summary-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.summary-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:12px 12px 0 0}
.card-income::before{background:var(--green)}
.card-expense::before{background:var(--red)}
.card-balance::before{background:var(--accent)}
.card-due::before{background:var(--yellow)}
.card-label{font-size:0.72rem;font-weight:700;letter-spacing:0.08em;color:var(--text-muted);text-transform:uppercase;margin-bottom:0.5rem}
.card-amount{font-family:var(--mono);font-size:1.5rem;font-weight:700;letter-spacing:-0.03em;line-height:1}
.card-income .card-amount{color:var(--green)}
.card-expense .card-amount{color:var(--red)}
.card-balance .card-amount{color:var(--accent-l)}
.card-due .card-amount{color:var(--yellow)}
.card-icon{position:absolute;right:1.2rem;top:50%;transform:translateY(-50%);font-size:2rem;opacity:0.1}

/* === Charts === */
.charts-grid{display:grid;grid-template-columns:2fr 1fr;gap:1rem;margin-bottom:1.5rem}
.chart-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.4rem}
.chart-card h3{font-size:0.875rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:1rem}
.chart-wrap{position:relative;min-height:200px;display:flex;align-items:center;justify-content:center}

/* === Tables === */
.table-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:1.5rem}
.table-header{padding:1rem 1.4rem;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);gap:0.5rem;flex-wrap:wrap}
.table-header h3{font-size:0.9rem;font-weight:700}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:0.875rem}
thead th{background:var(--bg-card2);padding:0.7rem 1.2rem;text-align:left;font-size:0.72rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-muted);border-bottom:1px solid var(--border);white-space:nowrap}
tbody td{padding:0.8rem 1.2rem;border-bottom:1px solid var(--border);color:var(--text)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(255,255,255,0.02)}

/* === Badges === */
.badge{display:inline-block;padding:0.2rem 0.6rem;border-radius:99px;font-size:0.72rem;font-weight:700;text-transform:uppercase;letter-spacing:0.05em}
.badge-income{background:var(--green-dim);color:var(--green)}
.badge-expense{background:var(--red-dim);color:var(--red)}
.badge-due{background:var(--yellow-dim);color:var(--yellow)}
.amount-income{color:var(--green);font-family:var(--mono);font-weight:600}
.amount-expense{color:var(--red);font-family:var(--mono);font-weight:600}
.amount-due{color:var(--yellow);font-family:var(--mono);font-weight:600}

/* === Modals === */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.7);backdrop-filter:blur(4px);z-index:1000;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity var(--t);padding:1rem}
.modal-overlay.active{opacity:1;pointer-events:all}
.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:1.8rem;width:100%;max-width:460px;max-height:90vh;overflow-y:auto;box-shadow:0 8px 48px rgba(0,0,0,0.6);transform:translateY(16px);transition:transform var(--t)}
.modal-overlay.active .modal{transform:translateY(0)}
.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.4rem}
.modal-header h3{font-size:1.05rem;font-weight:700}
.modal-close{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:1.2rem;line-height:1;padding:0.2rem;transition:color var(--t)}
.modal-close:hover{color:var(--text)}

/* === Spinner === */
.spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,0.3);border-top-color:#fff;border-radius:50%;animation:spin 0.7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* === Toast === */
#toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:9999;display:flex;flex-direction:column;gap:0.5rem}
.toast{background:var(--bg-card2);border:1px solid var(--border);border-radius:10px;padding:0.8rem 1.2rem;font-size:0.875rem;font-weight:500;min-width:260px;display:flex;align-items:center;gap:0.6rem;box-shadow:var(--shadow);animation:slideIn 0.25s ease}
.toast.success{border-left:3px solid var(--green)}
.toast.error{border-left:3px solid var(--red)}
.toast.info{border-left:3px solid var(--accent)}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@keyframes fadeOut{to{opacity:0;transform:translateX(20px)}}

/* === Filters === */
.filter-bar{display:flex;gap:0.75rem;margin-bottom:1rem;flex-wrap:wrap;align-items:center}
.filter-bar select,.filter-bar input[type=text],.filter-bar input[type=date]{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:0.5rem 0.8rem;color:var(--text);font-size:0.85rem;outline:none;transition:border-color var(--t)}
.filter-bar select:focus,.filter-bar input:focus{border-color:var(--accent)}

/* === Pagination === */
.pagination{display:flex;gap:0.4rem;flex-wrap:wrap}
.page-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:6px;font-size:0.8rem;font-weight:600;background:var(--bg-card2);border:1px solid var(--border);color:var(--text-muted);transition:all var(--t);text-decoration:none}
.page-btn:hover{background:var(--accent-dim);color:var(--accent-l);border-color:var(--accent)}
.page-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* === Empty State === */
.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-muted)}
.empty-icon{font-size:2.5rem;margin-bottom:0.75rem}
.empty-state p{font-size:0.9rem}

/* === Alerts === */
.alert{padding:0.75rem 1rem;border-radius:8px;font-size:0.875rem;margin-bottom:1rem;display:flex;align-items:center;gap:0.5rem}
.alert-error{background:var(--red-dim);border:1px solid rgba(239,68,68,0.3);color:#fca5a5}
.alert-success{background:var(--green-dim);border:1px solid rgba(34,197,94,0.3);color:#86efac}

/* === Auth link === */
.auth-link{text-align:center;margin-top:1.2rem;font-size:0.85rem;color:var(--text-muted)}
.auth-link a{color:var(--accent-l);font-weight:600}

/* === Monthly table === */
.monthly-table th,.monthly-table td{padding:0.6rem 1rem;font-size:0.825rem}

/* === Debtor row actions === */
.debtor-row-actions{display:flex;gap:0.5rem;flex-wrap:wrap}

/* === Mobile sidebar backdrop === */
.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:99}
.sidebar-backdrop.show{display:block}

/* === Responsive === */
@media(max-width:900px){.charts-grid{grid-template-columns:1fr}}
@media(max-width:720px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0);box-shadow:4px 0 24px rgba(0,0,0,0.5)}
  .main-content{margin-left:0}
  .hamburger{display:block}
  .cards-grid{grid-template-columns:repeat(2,1fr)}
  .page-content{padding:1rem}
  .modal{max-width:calc(100vw - 2rem)}
}
@media(max-width:400px){.cards-grid{grid-template-columns:1fr}}