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

/* ======================================================
   TOKENS & RESET
====================================================== */
:root {
  --bg:        #f8fafc;
  --bg2:       #ffffff;
  --surface:   #ffffff;
  --surface2:  #f1f5f9;
  --border:    #e2e8f0;
  --accent:    #0f172a;
  --accent2:   #334155;
  --blue:      #2563eb;
  --green:     #10b981;
  --red:       #ef4444;
  --yellow:    #f59e0b;
  --text:      #0f172a;
  --text2:     #475569;
  --text3:     #94a3b8;
  --radius:    6px;
  --radius-lg: 10px;
  --shadow:    0 1px 3px rgba(0,0,0,0.1);
  --trans:     .15s ease;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Outfit',sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  font-size:14px;
  line-height:1.6;
}

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

/* Sidebar */
.sidebar{
  width:240px;
  background:#ffffff;
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  padding:24px 0;
  position:sticky;top:0;height:100vh;
}
.sidebar-logo{
  padding:0 24px 28px;
  display:flex;align-items:center;gap:12px;
}
.sidebar-logo .logo-icon{
  width:36px;height:36px;border-radius:8px;
  background:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;flex-shrink:0;color:#fff;
}
.sidebar-logo h1{font-size:14px;font-weight:700;line-height:1.2;color:var(--text)}
.sidebar-logo span{font-size:11px;color:var(--text3)}

.nav-section{padding:0 12px 8px;font-size:10px;font-weight:600;
  color:var(--text3);text-transform:uppercase;letter-spacing:.08em;margin-top:12px}

.nav-item{
  display:flex;align-items:center;gap:12px;
  padding:12px 24px;
  color:var(--text2);
  text-decoration:none;
  font-size:14px;
  font-weight:500;
  transition:var(--trans);
  border-left:3px solid transparent;
}
.nav-item:hover{background:var(--surface2);color:var(--text)}
.nav-item.active{
  background:#f1f5f9;
  color:var(--blue);
  border-left-color:var(--blue);
}
.nav-item .nav-icon{font-size:16px;width:20px;text-align:center;flex-shrink:0}

/* Main */
.main-content{flex:1;padding:32px;overflow-y:auto}
.top-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.page-header{margin-bottom:28px}
.page-header h2{font-size:22px;font-weight:700;margin-bottom:4px}
.page-header p{color:var(--text2);font-size:13px}

/* ======================================================
   CARDS / PANELS
====================================================== */
.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  margin-bottom:24px;
  box-shadow:var(--shadow);
}
.card-title{
  font-size:16px;font-weight:600;color:var(--text);margin-bottom:20px;
  display:flex;align-items:center;gap:10px;
}
.card-title .badge{
  background:var(--surface2);padding:2px 8px;border-radius:20px;
  font-size:10px;color:var(--accent);font-weight:600;
}

/* ======================================================
   FORM ELEMENTS
====================================================== */
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:11.5px;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.05em}

input[type=number],input[type=text],input[type=password],select{
  background:var(--bg2);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:10px 14px;
  color:var(--text);
  font-family:inherit;font-size:14px;
  transition:var(--trans);
  width:100%;
  outline:none;
}
input[type=number]:focus,input[type=text]:focus,input[type=password]:focus,select:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(79,142,247,.15);
}
select{cursor:pointer}
select option{background:var(--bg2);color:var(--text)}

.toggle-group{
  display:flex;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
}
.toggle-group label{
  flex:1;text-align:center;padding:9px 12px;font-size:13px;
  cursor:pointer;transition:var(--trans);color:var(--text2);font-weight:500;
}
.toggle-group input[type=radio]{display:none}
.toggle-group input[type=radio]:checked + label{
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;font-weight:600;
}

/* ======================================================
   BUTTONS
====================================================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius);border:none;
  font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;
  transition:var(--trans);text-decoration:none;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;
}
.btn-primary:hover{opacity:.85;transform:translateY(-1px);box-shadow:0 4px 16px rgba(79,142,247,.35)}
.btn-ghost{
  background:transparent;border:1px solid var(--border);color:var(--text2);
}
.btn-ghost:hover{background:var(--surface2);color:var(--text);border-color:var(--text3)}
.btn-green{background:rgba(34,201,138,.15);color:var(--green);border:1px solid rgba(34,201,138,.3)}
.btn-green:hover{background:rgba(34,201,138,.25)}
.btn-sm{padding:6px 14px;font-size:12px}

/* ======================================================
   RESULT GRID (tek satır sonuç)
====================================================== */
.result-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(150px,1fr));
  gap:12px;
  margin-top:4px;
}
.result-tile{
  background:var(--surface);
  border:1px solid var(--border);
  padding:15px;
  border-radius:var(--radius);
  display:flex;
  flex-direction:column;
  gap:8px;
  transition:var(--trans);
  min-width: 0; /* İçeriğin taşmasını önlemek için */
}
.result-tile:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.rt-label{font-size:11px;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:0.05em}
.rt-val{font-size:18px;font-weight:700;color:var(--text);word-break:break-all;line-height:1.2}
.rt-val.positive{color:var(--green)}
.rt-val.negative{color:var(--red)}
.rt-val.warning{color:var(--yellow)}
.rt-val.highlight{color:var(--accent)}
.rt-sub{font-size:11px;color:var(--text3)}
.result-tile .rt-sub{font-size:10px;color:var(--text3);margin-top:2px}

/* ======================================================
   TABLES
====================================================== */
.table-wrap{overflow-x:auto;border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:12.5px}
thead th{
  background:var(--surface2);
  padding:10px 14px;
  text-align:right;
  font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;
  color:var(--text2);white-space:nowrap;border-bottom:1px solid var(--border);
}
thead th:first-child{text-align:left;border-radius:var(--radius) 0 0 0}
thead th:last-child{border-radius:0 var(--radius) 0 0}
tbody tr{border-bottom:1px solid rgba(42,47,74,.6);transition:var(--trans)}
tbody tr:hover{background:rgba(79,142,247,.05)}
tbody td{padding:10px 14px;text-align:right;color:var(--text);white-space:nowrap}
tbody td:first-child{text-align:left;font-weight:600;color:var(--text)}
tfoot td{
  padding:11px 14px;text-align:right;
  font-weight:700;font-size:13px;
  border-top:2px solid var(--border);
  background:var(--surface2);color:var(--accent);
}
tfoot td:first-child{text-align:left}

.dilim-badge{
  display:inline-flex;align-items:center;
  background:rgba(124,90,247,.18);color:var(--accent2);
  padding:2px 8px;border-radius:20px;font-size:10px;font-weight:700;
}
.td-net{color:var(--green)!important;font-weight:700}
.td-maliyet{color:var(--yellow)!important;font-weight:700}
.calc-table input,.calc-table select{
  padding:6px 10px;
  font-size:13px;
  border-radius:8px;
  background:rgba(255,255,255,0.03);
}
.calc-table input:focus{background:var(--bg2)}
.btn-remove{
  width:28px;height:28px;border-radius:50%;
  border:1px solid var(--border);background:rgba(247,90,90,0.1);
  color:var(--red);font-size:18px;display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:var(--trans);
}
.btn-remove:hover{background:var(--red);color:#fff}
.result-group{border-bottom:1px dashed var(--border);padding-bottom:16px}
.result-group:last-child{border-bottom:none}

/* ======================================================
   LOADING SPINNER
====================================================== */
.spinner{
  display:none;
  width:20px;height:20px;
  border:2px solid var(--border);
  border-top-color:var(--accent);
  border-radius:50%;
  animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ======================================================
   ALERT / NOTICE
====================================================== */
.alert{
  padding:12px 16px;border-radius:var(--radius);
  font-size:13px;margin-bottom:16px;display:flex;align-items:center;gap:10px;
}
.alert-info{background:rgba(79,142,247,.12);border:1px solid rgba(79,142,247,.25);color:var(--accent)}
.alert-error{background:rgba(247,90,90,.12);border:1px solid rgba(247,90,90,.25);color:var(--red)}
.alert-success{background:rgba(34,201,138,.12);border:1px solid rgba(34,201,138,.25);color:var(--green)}

/* Simulation Results Polishing */
#tek-result .card {
  animation: slideInUp .4s ease backwards;
}
@keyframes slideInUp {
  from { opacity:0; transform:translateY(20px); }
  to { opacity:1; transform:translateY(0); }
}

.calc-table select {
  cursor:pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b93b8' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}

/* ======================================================
   PARAM TABLE (admin)
====================================================== */
.param-row{display:grid;grid-template-columns:1fr 180px 140px;gap:12px;align-items:center;
  padding:10px 0;border-bottom:1px solid var(--border)}
.param-row:last-child{border-bottom:none}
.param-label{font-weight:500;color:var(--text)}
.param-desc{font-size:11px;color:var(--text3);margin-top:2px}

/* ======================================================
   TABS
====================================================== */
.tabs{display:flex;gap:4px;margin-bottom:20px;border-bottom:1px solid var(--border);padding-bottom:0}
.tab-btn{
  padding:10px 20px;border:none;background:transparent;
  color:var(--text2);font-family:inherit;font-size:13px;font-weight:500;
  cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;
  transition:var(--trans);
}
.tab-btn.active,.tab-btn:hover{color:var(--text)}
.tab-btn.active{border-bottom-color:var(--accent);color:var(--accent);font-weight:600}
.tab-pane{display:none}.tab-pane.active{display:block}

/* ======================================================
   RESPONSIVE
====================================================== */
@media(max-width:900px){
  .sidebar{width:60px;padding:16px 0}
  .sidebar-logo h1,.sidebar-logo span,.nav-section,.nav-item span:not(.nav-icon){display:none}
  .nav-item{padding:12px;justify-content:center;margin:2px 6px}
  .main-content{padding:20px}
}
@media(max-width:600px){
  .form-grid{grid-template-columns:1fr 1fr}
  .result-grid{grid-template-columns:1fr 1fr}
}