/* ══════════════════════════════════════════════════════════════════════════════
   SpeakEase — Design System (CryoSim Light Theme)
   ══════════════════════════════════════════════════════════════════════════════ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#eef4fa;--bg2:#f7fafe;--surface:#ffffff;--surface2:#f0f7fc;
  --border:rgba(20,60,100,0.10);--border2:rgba(20,60,100,0.17);
  --text:#1a2e42;--text2:#3d5a72;--muted:#7a95ab;
  --accent:#3a8fd4;--accent2:#6cb4e8;--accent3:#0da7a0;
  --green:#2a7d9c;--green2:#1a6b5a;--red:#8b3a4a;--orange:#b86e1a;--yellow:#c8a020;
  --radius:14px;--radius-sm:10px;--radius-lg:22px;
  --shadow:0 16px 36px rgba(30,70,110,0.06);--shadow-lg:0 28px 60px rgba(30,70,110,0.10);
  --transition:.2s cubic-bezier(.4,0,.2,1);
  --glow:0 8px 28px rgba(58,143,212,0.12);
  --se-purple:#6c5ce7;--se-purple2:#a29bfe;
}

body{
  font-family:'Inter','Segoe UI',system-ui,sans-serif;color:var(--text);min-height:100vh;overflow-x:hidden;
  background:
    radial-gradient(circle at top left,rgba(58,143,212,0.10),transparent 32%),
    radial-gradient(circle at 80% 10%,rgba(168,200,232,0.14),transparent 24%),
    radial-gradient(ellipse at 90% 90%,rgba(108,180,232,0.06),transparent 30%),
    linear-gradient(180deg,#f7fafe 0%,#e4eef7 50%,#d8e8f4 100%);
  background-attachment:fixed;
}
a{color:var(--accent);text-decoration:none}a:hover{color:#2d7ab8}
button{font-family:inherit;cursor:pointer}
::selection{background:rgba(58,143,212,0.14);color:var(--text)}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg2)}::-webkit-scrollbar-thumb{background:rgba(16,52,78,0.16);border-radius:3px}

/* ── Topbar ── */
.cryo-topbar{position:sticky;top:0;z-index:150}

/* ── App Shell ── */
.se-app{display:flex;min-height:calc(100vh - 52px)}

/* ── Sidebar ── */
.se-sidebar{
  width:280px;height:calc(100vh - 52px);
  background:linear-gradient(180deg,rgba(255,255,255,0.97),rgba(245,250,253,0.98));
  border-right:1px solid var(--border);
  display:flex;flex-direction:column;position:sticky;top:52px;flex-shrink:0;
  box-shadow:var(--shadow);overflow-y:auto;
}
.se-sidebar-brand{padding:20px 20px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px}
.se-logo{
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent3),var(--accent));
  display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:1rem;flex-shrink:0;
}
.se-sidebar-brand h1{font-size:1.1rem;font-weight:700;color:var(--text);line-height:1.2}
.se-subtitle{font-size:.72rem;color:var(--muted);font-weight:500}

.se-focus-banner{
  margin:12px 12px 0;padding:10px 14px;border-radius:var(--radius-sm);
  background:linear-gradient(135deg,rgba(13,167,160,0.08),rgba(58,143,212,0.08));
  border:1px solid rgba(13,167,160,0.15);
  font-size:.75rem;font-weight:600;color:var(--accent3);line-height:1.5;text-align:center;
}

/* Nav */
.se-nav{flex:1;padding:8px 10px;overflow-y:auto}
.se-nav-group{margin-bottom:4px}
.se-nav-label{font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:10px 10px 4px;font-weight:600}
.se-nav-item{
  display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:var(--radius-sm);
  color:var(--text2);cursor:pointer;transition:all var(--transition);font-size:.82rem;font-weight:500;
  position:relative;
}
.se-nav-item:hover{background:var(--surface2);color:var(--text)}
.se-nav-item.active{background:rgba(58,143,212,.08);color:var(--accent)}
.se-nav-item.active::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;background:var(--accent);border-radius:2px}
.se-nav-item.done .se-nav-num{background:var(--accent3);color:#fff}
.se-nav-num{
  width:24px;height:24px;border-radius:50%;
  background:var(--surface2);border:1.5px solid var(--border2);
  display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;flex-shrink:0;
  transition:all var(--transition);
}
.se-nav-title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.se-nav-progress{font-size:.68rem;font-weight:600;color:var(--muted);flex-shrink:0}
.se-nav-progress.complete{color:var(--accent3)}

.se-sidebar-footer{padding:12px;border-top:1px solid var(--border)}
.se-user-card{display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--radius-sm);background:var(--surface2);border:1px solid var(--border)}
.se-avatar{
  width:32px;height:32px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:.8rem;flex-shrink:0;
}
.se-user-name{font-size:.82rem;font-weight:600;color:var(--text)}
.se-user-role{font-size:.7rem;color:var(--muted);text-transform:capitalize}

/* ── Main ── */
.se-main{flex:1;min-height:calc(100vh - 52px);padding:24px 32px 48px}

/* ── Hero (unenrolled / guest) ── */
.se-hero{display:flex;align-items:center;justify-content:center;min-height:60vh}
.se-hero-inner{
  text-align:center;max-width:520px;
  background:var(--surface);border-radius:var(--radius-lg);padding:48px 40px;
  box-shadow:var(--shadow-lg);border:1px solid var(--border);
}
.se-hero-inner h2{font-size:1.6rem;font-weight:800;margin-bottom:12px}
.se-hero-desc{color:var(--text2);font-size:.95rem;line-height:1.6;margin-bottom:28px}
.se-hero-stats{display:flex;justify-content:center;gap:32px;margin-bottom:32px}
.se-stat{display:flex;flex-direction:column;align-items:center;gap:2px}
.se-stat-num{font-size:1.5rem;font-weight:800;color:var(--accent)}
.se-stat-label{font-size:.75rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.se-hero-actions{display:flex;gap:12px;justify-content:center}

/* ── Buttons ── */
.se-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 22px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:600;
  border:none;cursor:pointer;transition:all var(--transition);
}
.se-btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:var(--glow)}
.se-btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 32px rgba(58,143,212,0.18)}
.se-btn-outline{background:transparent;border:1.5px solid var(--border2);color:var(--text2)}
.se-btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(58,143,212,.04)}
.se-btn-lg{padding:14px 36px;font-size:1rem;border-radius:var(--radius)}
.se-btn-nav{padding:8px 18px;font-size:.84rem}

/* ── Day Panel ── */
.se-day-panel{animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.se-day-header{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-bottom:20px;
}
.se-day-week{font-size:.78rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.se-day-title{font-size:1.35rem;font-weight:800;margin-top:4px}

/* Progress ring */
.se-day-progress-ring{position:relative;width:56px;height:56px;flex-shrink:0}
.se-ring{width:100%;height:100%;transform:rotate(-90deg)}
.se-ring-bg{fill:none;stroke:var(--surface2);stroke-width:3}
.se-ring-fill{fill:none;stroke:var(--accent3);stroke-width:3;stroke-linecap:round;transition:stroke-dasharray .4s ease}
.se-ring-label{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;color:var(--text2)}

/* Session label */
.se-session-label{
  display:flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:var(--radius-sm);
  background:linear-gradient(135deg,rgba(58,143,212,0.06),rgba(13,167,160,0.06));
  border:1px solid rgba(58,143,212,0.12);
  font-size:.82rem;font-weight:700;color:var(--accent);margin-bottom:20px;
}
.se-session-label svg{opacity:.7}

/* ── Activities ── */
.se-activities{display:flex;flex-direction:column;gap:8px;margin-bottom:24px}
.se-activity{
  display:flex;gap:12px;padding:14px 16px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--border);
  transition:all var(--transition);
}
.se-activity:hover{border-color:var(--accent);box-shadow:var(--glow)}
.se-activity.done{background:rgba(13,167,160,0.03);border-color:rgba(13,167,160,0.15)}
.se-activity.done .se-activity-text{color:var(--muted)}

.se-check{
  width:28px;height:28px;border-radius:50%;flex-shrink:0;
  border:2px solid var(--border2);background:var(--surface);
  display:flex;align-items:center;justify-content:center;
  transition:all var(--transition);margin-top:2px;
}
.se-check svg{width:14px;height:14px;opacity:0;color:#fff;transition:opacity .15s}
.se-check:hover{border-color:var(--accent3)}
.se-check.checked{background:var(--accent3);border-color:var(--accent3)}
.se-check.checked svg{opacity:1}

.se-activity-body{flex:1;display:flex;flex-wrap:wrap;align-items:baseline;gap:8px}
.se-time-badge{
  display:inline-flex;align-items:center;padding:2px 8px;border-radius:6px;
  background:rgba(58,143,212,0.08);color:var(--accent);font-size:.72rem;font-weight:700;
  white-space:nowrap;flex-shrink:0;
}
.se-activity-text{font-size:.88rem;line-height:1.55;color:var(--text2);flex:1 1 200px}

/* ── Tip ── */
.se-tip{
  display:flex;gap:10px;padding:14px 18px;border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(200,160,32,0.06),rgba(184,110,26,0.06));
  border:1px solid rgba(200,160,32,0.15);
  font-size:.84rem;color:var(--orange);line-height:1.55;font-style:italic;margin-bottom:24px;
}
.se-tip svg{flex-shrink:0;margin-top:2px;opacity:.7}

/* ── Homework ── */
.se-homework{
  margin-bottom:24px;padding:18px 20px;border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(108,92,231,0.04),rgba(162,155,254,0.06));
  border:1px solid rgba(108,92,231,0.12);
}
.se-homework-header{
  display:flex;align-items:center;gap:8px;
  font-size:.84rem;font-weight:700;color:var(--se-purple);margin-bottom:14px;
}
.se-homework-header svg{opacity:.7}
.se-homework-list{display:flex;flex-direction:column;gap:10px}
.se-homework-item{display:flex;gap:10px;align-items:flex-start}
.se-hw-bullet{
  width:22px;height:22px;border-radius:50%;flex-shrink:0;
  background:rgba(108,92,231,0.1);color:var(--se-purple);
  display:flex;align-items:center;justify-content:center;
  font-size:.7rem;font-weight:700;margin-top:1px;
}
.se-hw-text{font-size:.86rem;line-height:1.55;color:var(--text2)}

/* ── Notes ── */
.se-notes-section{margin-bottom:32px}
.se-notes-label{display:block;font-size:.78rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:8px}
.se-notes{
  width:100%;min-height:80px;padding:12px 16px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--surface);
  font-family:inherit;font-size:.88rem;color:var(--text);line-height:1.5;resize:vertical;
  transition:border-color var(--transition);
}
.se-notes:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(58,143,212,0.1)}
.se-notes-status{font-size:.72rem;color:var(--muted);margin-top:4px;min-height:16px}

/* ── Day Nav ── */
.se-day-nav{display:flex;justify-content:space-between;align-items:center;padding-top:8px;border-top:1px solid var(--border)}
.se-complete-msg{font-size:1rem;font-weight:700;color:var(--accent3)}

/* ── Timer Modal ── */
.se-timer-overlay{
  position:fixed;inset:0;z-index:500;
  background:rgba(10,30,50,0.5);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;
}
.se-timer-modal{
  background:var(--surface);border-radius:var(--radius-lg);padding:40px 48px;
  box-shadow:var(--shadow-lg);text-align:center;min-width:300px;
}
.se-timer-display{font-size:3.5rem;font-weight:800;font-variant-numeric:tabular-nums;color:var(--text);margin-bottom:8px}
.se-timer-label{font-size:.88rem;color:var(--muted);margin-bottom:24px}
.se-timer-controls{display:flex;gap:10px;justify-content:center}

/* ── Responsive ── */
@media(max-width:900px){
  .se-sidebar{display:none}
  .se-main{padding:16px}
}
@media(max-width:600px){
  .se-hero-inner{padding:28px 20px}
  .se-hero-inner h2{font-size:1.25rem}
  .se-day-title{font-size:1.1rem}
  .se-activity{padding:10px 12px}
  .se-timer-display{font-size:2.5rem}
  .se-timer-modal{padding:28px 24px;min-width:auto}
}