/* ===== Global Theme ===== */
:root{
  --bg:#0f172a;
  --bg2:#0b1220;
  --panel:#111827;
  --card:#1f2933;
  --button:#022c22;
  --accent:#22c55e;
  --accent-soft:#4ade80;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --border:#2a3441;
  --top:#020617;
  --logout:#e98484;
  --note:#c7f9cc;
  --volume:#86efac;
  padding-top: 20px;
}

*{box-sizing:border-box;}

body{
  margin:0;
  font-family: 'Inter', system-ui, sans-serif;
  background:linear-gradient(180deg,var(--bg2),var(--bg));
  color:var(--text);
}

h1{
  text-align:center;
  margin:20px 0 10px 0;
  font-size:28px;
  letter-spacing:1px;
}

h2,h3{margin:0 0 10px 0;}

/* ===== Layout Grid ===== */
#topbar{
  position: sticky;
  top: 0;

  display: flex;
  justify-content: space-between;
  align-items: center;

  padding: 12px 24px;

  background: var(--top);
  border-bottom: 1px solid var(--border);

  z-index: 1000;
}

#logo{
  font-weight: bold;
  font-size: 30px;
}

#topbar-actions button{
  background: var(--logout);
  border: none;
  padding: 8px 14px;
  border-radius: 6px;
  color: white;
  cursor: pointer;
}

#auth-panel, #register-panel{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    background: var(--bg);
    padding: 40px;
    border-radius: 14px;
    width: 320px;

    display: flex;
    flex-direction: column;
    gap: 10px;

    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

#app{
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:16px;
  max-width:1100px;
  margin:auto;
}

.panel{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  margin-top:10px;
  box-shadow:0 10px 30px rgba(0,0,0,.25);
}

.panel h2{
  margin-bottom:12px;
  border-bottom:1px solid var(--border);
  padding-bottom:6px;
}

/* ===== Inputs ===== */
#auth-panel input,
#register-panel input{
    padding: 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--top);
    color: white;
    margin-bottom:5px;
}

#auth-panel button,
#register-panel button{
    padding: 10px;
    border-radius: 6px;
    border: none;
    background: var(--accent);
    color: black;
    font-weight: bold;
    cursor: pointer;
}

input, button{
  background:var(--bg2);
  color:var(--text);
  border:1px solid var(--border);
  border-radius:8px;
  padding:8px 10px;
}

input::placeholder{color:var(--muted);}

button{
  cursor:pointer;
  background:linear-gradient(135deg,var(--accent),var(--accent-soft));
  color:var(--button);
  font-weight:600;
  border:none;
  transition:.2s;
}

button:hover{transform:translateY(-1px);filter:brightness(1.05);}

/* ===== Calendar ===== */
#calendar-grid{
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:8px;
}

.day{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:10px;
  min-height:90px;
  padding:6px;
  cursor:pointer;
  position:relative;
  transition:.2s;
}

.day-s{
  background:var(--card);
  border:1px solid var(--accent-soft);
  border-radius:10px;
  min-height:90px;
  padding:6px;
  cursor:pointer;
  position:relative;
  transition:.2s;
}

.day:hover{transform:translateY(-2px);border-color:var(--accent-soft);}

.day-number{
  font-size:12px;
  color:var(--muted);
}

.day-name{
  font-size: 11px;
  color: var(--muted);
}

.session-dot-c{
  width:8px;
  height:8px;
  background:var(--accent);
  border-radius:50%;
  margin-top:4px;
}

.session-dot{
  width:8px;
  height:8px;
  background:var(--logout);
  border-radius:50%;
  margin-top:4px;
}


/* ===== Sessions ===== */
.session-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:12px;
  padding:12px;
  margin-bottom:10px;
  overflow:hidden;
}

.session-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-weight:600;
}

.session-title{font-size:15px;}

.session-desc{
  margin-top:6px;
  color:var(--muted);
}

.session-notes{
  margin-top:6px;
  font-style:italic;
  color:var(--note);
}

.session-volume{
  margin-left:8px;
  font-size:13px;
  color:var(--volume);
}

.session-actions{
  display:flex;
  gap:8px;
  margin-top:10px;
  flex-wrap:wrap;
  align-items:center;
}

/* ===== Goals ===== */
.goal-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:10px;
  padding:8px;
  margin-bottom:6px;
  display:flex;
  justify-content:space-between;
}

/* ===== PBs ===== */
.pb-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:10px;
  padding:8px;
  margin-top:6px;
  display:flex;
  justify-content:space-between;
}

/* ===== Stats ===== */
/* Flip switch */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--border);
  transition: 0.4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px; width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: var(--accent);
  transition: 0.4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--border);
}

input:checked + .slider:before {
  transform: translateX(26px);
}

#stats canvas{
  background:var(--bg2);
  border:1px solid var(--border);
  border-radius:12px;
  margin-top:10px;
}

#yearly-panel canvas{
  width:100%;
  max-width:100%;
  height:350px;
}

/* ===== Headers ===== */
#calendar-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:10px;
}

#month-label{font-weight:600;}