/* Study4French v2 — style.css CLEAN */

:root {
  --navy:#1a2744;--blue:#1a6ee8;--blue-lt:#4a85f5;--gold:#f0a500;
  --cream:#f8f6f2;--cream2:#f0ece4;--red:#e02020;--green:#17a84a;
  --text:#1a1a2e;--text2:#50506a;--text3:#999;--border:#ddd8cf;
  --shadow:0 2px 10px rgba(26,39,68,.1);--shadow-md:0 6px 24px rgba(26,39,68,.14);
  --r:12px;--r-sm:8px;
  --font:'Trebuchet MS','Calibri','Segoe UI',Arial,sans-serif;
  --tr:0.2s ease;
}
@media(prefers-color-scheme:dark){:root{--navy:#0e1929;--cream:#12192a;--cream2:#1a2540;--text:#e8e4da;--text2:#a0a0c0;--border:#2a3550;}}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{font-size:16px;scroll-behavior:smooth;}
body{font-family:var(--font);font-size:16px;color:var(--text);background:var(--cream);line-height:1.7;min-height:100vh;-webkit-font-smoothing:antialiased;}
p{margin-bottom:8px;}p:last-child{margin-bottom:0;}strong{font-weight:700;}

.app-wrap{max-width:740px;margin:0 auto;padding:0 16px 120px;}

/* HEADER */
.site-header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:100;box-shadow:0 3px 12px rgba(0,0,0,.3);}
.header-inner{max-width:740px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;gap:12px;}
.header-mascot{flex-shrink:0;animation:float 3s ease-in-out infinite;}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
.header-logo{font-size:1.35rem;font-weight:700;color:#fff;line-height:1.1;}
.header-logo span{color:var(--gold);}
.header-subtitle{font-size:.72rem;color:rgba(255,255,255,.55);letter-spacing:.07em;text-transform:uppercase;margin-top:2px;}
.header-flag{margin-left:auto;font-size:1.4rem;}
.stats-bar{max-width:740px;margin:0 auto;padding:5px 16px;font-size:.75rem;color:rgba(255,255,255,.5);display:flex;gap:16px;}
.stats-bar strong{color:rgba(255,255,255,.85);}

/* CARDS */
.card{background:#fff;border-radius:var(--r);padding:24px;margin-top:18px;box-shadow:var(--shadow);border:1px solid var(--border);}
@media(prefers-color-scheme:dark){.card{background:#162135;}}

/* INSTITUTIONAL HEADER */
.inst-header{background:#fff;border-radius:var(--r);border:1px solid var(--border);box-shadow:var(--shadow);margin-top:18px;overflow:hidden;}
@media(prefers-color-scheme:dark){.inst-header{background:#162135;}}

.inst-top{display:flex;align-items:center;gap:16px;padding:14px 20px;background:linear-gradient(135deg,#eef4ff,#e8f0ff);border-bottom:1px solid var(--border);}
@media(prefers-color-scheme:dark){.inst-top{background:#1a2744;}}

.inst-logo{width:120px;height:45px;object-fit:contain;flex-shrink:0;}

.inst-titles{flex:1;text-align:center;}
.inst-uni{font-size:.82rem;font-weight:700;color:var(--navy);text-transform:uppercase;letter-spacing:.05em;line-height:1.3;}
.inst-lab{font-size:.78rem;color:var(--text2);line-height:1.5;margin-top:4px;}
.inst-project{font-size:.95rem;font-weight:700;color:var(--blue);margin-top:6px;}
@media(prefers-color-scheme:dark){.inst-uni{color:#c0ccf0;}.inst-project{color:var(--blue-lt);}}

.inst-body{display:flex;flex-direction:row;gap:20px;padding:18px 20px;align-items:flex-start;}
.inst-robot{width:120px;height:auto;flex-shrink:0;border-radius:10px;display:block;}
.inst-desc{flex:1;min-width:0;font-size:.88rem;color:var(--text2);line-height:1.7;}
.inst-disclaimer{margin-top:10px;padding:8px 12px;background:#fffbe6;border-left:3px solid var(--gold);border-radius:6px;font-size:.82rem;color:#555;}
@media(prefers-color-scheme:dark){.inst-disclaimer{background:#2a2000;color:#c0a060;}}

@media(max-width:520px){
  .inst-top{flex-direction:column;text-align:center;}
  .inst-body{flex-direction:column;align-items:center;}
  .inst-robot{width:140px;}
}

/* MODE SELECTOR */
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0 0;}
.mode-btn{border:2px solid var(--border);border-radius:var(--r);padding:18px 12px;cursor:pointer;text-align:center;background:var(--cream2);transition:all var(--tr);}
.mode-btn:hover{border-color:var(--blue);background:#eef4ff;transform:translateY(-2px);box-shadow:var(--shadow-md);}
.mode-btn.active{border-color:var(--blue);background:linear-gradient(135deg,#e8f0ff,#f0f6ff);box-shadow:var(--shadow-md);}
.mode-btn.exam-btn.active{border-color:var(--navy);background:linear-gradient(135deg,#e8ecf8,#f0f2ff);}
.mode-icon{font-size:2.2rem;margin-bottom:8px;}
.mode-title{font-size:1rem;font-weight:700;color:var(--navy);margin-bottom:4px;}
.mode-desc{font-size:.78rem;color:var(--text2);line-height:1.4;}
@media(max-width:480px){.mode-grid{grid-template-columns:1fr;}}
@media(prefers-color-scheme:dark){
  .mode-btn{background:var(--cream2);}
  .mode-btn:hover,.mode-btn.active{background:#1a2d55;border-color:var(--blue-lt);}
}

/* TYPE LABEL */
.type-label{display:block;font-size:.75rem;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.08em;margin:16px 0 10px;}

/* EXERCISE TYPE BUTTONS */
.type-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-bottom:18px;}

.type-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:16px 8px 14px;border-radius:12px;border:2.5px solid;cursor:pointer;font-family:var(--font);transition:all var(--tr);text-align:center;}
.type-btn:hover{transform:translateY(-3px);box-shadow:0 6px 18px rgba(0,0,0,.2);}
.type-btn.active{transform:translateY(-3px);box-shadow:0 6px 18px rgba(0,0,0,.25);}

.t-icon{font-size:1.6rem;line-height:1;}
.t-label{font-size:.88rem;font-weight:700;line-height:1.2;}
.t-pts{font-size:.75rem;font-weight:600;opacity:.9;}

/* Α1 sky blue */
.t-a1{background:#cce5ff;border-color:#4da6ff;color:#003a8c;}
.t-a1:hover,.t-a1.active{background:#0057d8;border-color:#0057d8;color:#fff;}
/* Α2 teal */
.t-a2{background:#c0f0da;border-color:#20c070;color:#005528;}
.t-a2:hover,.t-a2.active{background:#009950;border-color:#009950;color:#fff;}
/* Β1 amber */
.t-b1{background:#ffe8a0;border-color:#ffaa00;color:#6a3d00;}
.t-b1:hover,.t-b1.active{background:#e88000;border-color:#e88000;color:#fff;}
/* Β2 violet */
.t-b2{background:#e0d0ff;border-color:#9060f8;color:#2e0880;}
.t-b2:hover,.t-b2.active{background:#6600ee;border-color:#6600ee;color:#fff;}
/* Β3 rose */
.t-b3{background:#ffd0dc;border-color:#ff5080;color:#800020;}
.t-b3:hover,.t-b3.active{background:#e8003a;border-color:#e8003a;color:#fff;}
/* Γ emerald */
.t-g{background:#b8f5e0;border-color:#00cc80;color:#005030;}
.t-g:hover,.t-g.active{background:#009960;border-color:#009960;color:#fff;}

@media(max-width:480px){.type-grid{grid-template-columns:repeat(2,1fr);}}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:var(--r-sm);border:none;font-family:var(--font);font-size:1rem;font-weight:700;cursor:pointer;transition:all var(--tr);}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 3px 12px rgba(45,108,223,.3);}
.btn-primary:hover{background:var(--blue-lt);transform:translateY(-1px);}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;}

.fab-reset{position:fixed;bottom:20px;right:20px;z-index:999;background:var(--gold);color:#fff;border:none;border-radius:50px;padding:10px 18px;font-size:.82rem;font-weight:700;font-family:var(--font);cursor:pointer;box-shadow:0 4px 16px rgba(200,151,58,.4);opacity:.8;transition:all var(--tr);}
.fab-reset:hover{opacity:1;transform:translateY(-2px);}

/* SPINNER */
.spinner{display:flex;flex-direction:column;align-items:center;gap:14px;padding:24px;}
.spinner-dots{display:flex;gap:8px;}
.spinner-dots span{width:10px;height:10px;border-radius:50%;background:var(--blue);animation:dot-bounce 1.2s ease-in-out infinite;}
.spinner-dots span:nth-child(2){animation-delay:.2s;}
.spinner-dots span:nth-child(3){animation-delay:.4s;}
@keyframes dot-bounce{0%,80%,100%{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}
.spinner-text{font-style:italic;color:var(--text2);font-size:.88rem;animation:pulse 2s ease-in-out infinite;}
@keyframes pulse{0%,100%{opacity:.6}50%{opacity:1}}
.funny-msg{background:#fffbe6;border:1px solid #f0d060;border-radius:var(--r-sm);padding:12px 16px;font-size:.88rem;color:#5a4000;font-style:italic;margin-bottom:16px;line-height:1.5;}
@media(prefers-color-scheme:dark){.funny-msg{background:#2a2000;border-color:#604000;color:#f0c060;}}

/* EXERCISE BOX */
.exercise-box{background:#f6f4ee;border-left:4px solid var(--blue);font-size:.96rem;line-height:1.85;white-space:pre-wrap;word-break:break-word;}
@media(prefers-color-scheme:dark){.exercise-box{background:#1a2540;border-left-color:var(--blue-lt);}}

/* VERB BANNER */
.verb-banner{background:#e8f0ff;border:1.5px solid #b0ccff;border-radius:var(--r-sm);padding:12px 16px;margin-bottom:14px;}
.verb-banner-label{font-size:.75rem;font-weight:700;color:var(--blue);margin-bottom:8px;text-transform:uppercase;letter-spacing:.06em;}
.verb-tags{display:flex;flex-wrap:wrap;gap:7px;}
.verb-tag{background:var(--blue);color:#fff;padding:4px 13px;border-radius:20px;font-size:.86rem;font-weight:700;}

/* ANSWER FIELDS */
.answer-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.answer-num{font-weight:700;color:var(--blue);min-width:28px;flex-shrink:0;font-size:.95rem;}
.answer-input{flex:1;padding:12px 16px;border:2px solid var(--border);border-radius:var(--r-sm);font-size:1rem;font-family:var(--font);background:var(--cream);color:var(--text);transition:border-color var(--tr),box-shadow var(--tr);}
.answer-input:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px rgba(45,108,223,.15);}
.answer-textarea{width:100%;padding:14px 16px;border:1.5px solid var(--border);border-radius:var(--r-sm);font-size:.96rem;font-family:var(--font);background:var(--cream);color:var(--text);resize:vertical;min-height:200px;line-height:1.7;transition:border-color var(--tr);}
.answer-textarea:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px rgba(45,108,223,.15);}
@media(prefers-color-scheme:dark){.answer-input,.answer-textarea{background:#1a2540;color:var(--text);border-color:var(--border);}}

/* KEYBOARD */
.kbd-toggle{font-size:.78rem;color:var(--text2);cursor:pointer;padding:4px 10px;border-radius:6px;border:1px solid var(--border);background:none;font-family:var(--font);margin-bottom:8px;transition:all var(--tr);}
.kbd-toggle:hover{border-color:var(--blue);color:var(--blue);}
.kbd-wrap{display:none;margin:8px 0 14px;}
.kbd-row{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:6px;}
.kbd-key{padding:7px 10px;border:1px solid var(--border);border-radius:6px;background:var(--cream2);cursor:pointer;font-size:.95rem;font-family:var(--font);transition:all .15s;min-width:36px;text-align:center;}
.kbd-key:hover{background:var(--blue);color:#fff;border-color:var(--blue);}

/* EVALUATION */
.eval-panel{text-align:left;font-size:.94rem;line-height:1.7;}
.eval-item{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;border-radius:var(--r-sm);margin-bottom:8px;line-height:1.5;}
.eval-item.correct{background:#edf7ed;border-left:4px solid var(--green);}
.eval-item.wrong{background:#fdecea;border-left:4px solid var(--red);}
.eval-item.neutral{background:var(--cream2);border-left:4px solid var(--border);}
.eval-icon{font-size:1.1rem;flex-shrink:0;margin-top:1px;}
.eval-text{flex:1;}
.score-box{margin-top:18px;padding:18px;background:linear-gradient(135deg,#e8f0ff,#f0f6ff);border-radius:var(--r);border:2px solid var(--blue);text-align:center;}
.score-big{font-size:2.4rem;font-weight:700;display:block;}
.score-label{font-size:.85rem;color:var(--text2);margin-top:2px;}
.score-badge{display:inline-block;margin-top:6px;padding:3px 14px;border-radius:20px;font-size:.8rem;font-weight:700;background:var(--navy);color:#fff;}
.eval-encourage{margin-top:14px;font-style:italic;color:var(--text2);font-size:.88rem;text-align:center;}
.eval-actions{margin-top:18px;display:flex;flex-direction:column;align-items:center;gap:12px;border-top:1px solid var(--border);padding-top:16px;}
.rating-row{display:flex;align-items:center;gap:10px;font-size:.86rem;color:var(--text2);}
.rating-btn{padding:8px 18px;border-radius:var(--r-sm);border:1.5px solid var(--border);background:var(--cream);cursor:pointer;font-size:1.2rem;transition:all var(--tr);}
.rating-btn:hover{border-color:var(--blue);transform:scale(1.1);}
.rating-btn:disabled{opacity:.4;cursor:not-allowed;transform:none;}
.btn-print{background:#555;color:#fff;border:none;border-radius:var(--r-sm);padding:9px 18px;font-size:.84rem;cursor:pointer;font-family:var(--font);}
@media(prefers-color-scheme:dark){
  .eval-item.correct{background:#1a3a1a;border-left-color:#4caf50;}
  .eval-item.wrong{background:#3a1a1a;border-left-color:#ef5350;}
  .score-box{background:linear-gradient(135deg,#1a2d55,#1e2d50);border-color:var(--blue-lt);}
  .rating-btn{background:var(--cream2);}
}

/* EXAM */
.exam-progress{background:linear-gradient(135deg,#e8f0ff,#f0f6ff);border:2px solid var(--blue);border-radius:var(--r);padding:16px 20px;margin-top:16px;display:none;}
.exam-progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;}
.exam-title{font-weight:700;color:var(--navy);}
.exam-step-counter{font-size:.84rem;color:var(--text2);}
.progress-bar{width:100%;height:8px;background:var(--border);border-radius:10px;overflow:hidden;margin-bottom:8px;}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--blue),var(--blue-lt));border-radius:10px;transition:width .4s ease;}
.step-labels{display:flex;justify-content:space-between;font-size:.76rem;color:var(--text3);}
.step-labels .done{color:var(--green);font-weight:700;}
.step-labels .active{color:var(--blue);font-weight:700;}
.exam-score-so-far{font-size:.86rem;color:var(--text2);margin-top:6px;}
.btn-next-step{background:var(--green);color:#fff;border:none;border-radius:var(--r-sm);padding:12px 26px;font-size:.95rem;font-weight:700;cursor:pointer;margin:14px auto 0;display:block;font-family:var(--font);transition:all var(--tr);}
.btn-next-step:hover{filter:brightness(1.1);}
.exam-summary{display:none;text-align:center;padding:24px 20px;}
.exam-summary h2{font-size:1.5rem;font-weight:700;color:var(--navy);margin-bottom:8px;}
.exam-table{width:100%;max-width:380px;margin:16px auto;border-collapse:collapse;}
.exam-table th,.exam-table td{padding:9px 14px;border:1px solid var(--border);text-align:center;font-size:.88rem;}
.exam-table th{background:var(--navy);color:#fff;font-weight:700;}
.exam-table tr:nth-child(even) td{background:var(--cream2);}
.exam-total{font-weight:700;font-size:1.1rem;color:var(--blue);}
.btn-exam{background:var(--navy);color:#fff;border:none;border-radius:var(--r-sm);padding:10px 20px;font-size:.9rem;font-weight:700;cursor:pointer;font-family:var(--font);margin:6px;transition:all var(--tr);}
.btn-exam:hover{background:#243558;}
.btn-ghost{background:transparent;color:var(--text2);border:1.5px solid var(--border);border-radius:var(--r-sm);padding:10px 20px;font-size:.9rem;cursor:pointer;font-family:var(--font);margin:6px;transition:all var(--tr);}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);}

/* PRINT */
@media print{
  .site-header,.mode-grid,.type-grid,.btn-primary,.fab-reset,
  .kbd-toggle,.kbd-wrap,.rating-row,.btn-print,.btn-next-step,.exam-progress{display:none!important;}
  body{background:#fff;}
  .card{box-shadow:none;border:1px solid #ccc;}
}

/* MOBILE */
@media(max-width:540px){
  .app-wrap{padding:0 10px 120px;}
  .card{padding:16px;}
  .fab-reset{bottom:14px;right:14px;font-size:.78rem;}
}

/* ═══════════════════════════════
   SMARTPHONE IMPROVEMENTS
   Target: 360px-480px screens
═══════════════════════════════ */

@media(max-width:480px){

  /* Header: hide subtitle on very small screens */
  .header-subtitle { display: none; }
  .header-mascot svg { width: 38px; height: 38px; }
  .header-logo { font-size: 1.15rem; }

  /* Stats bar: wrap */
  .stats-bar { flex-wrap: wrap; gap: 8px; font-size: .7rem; }

  /* Institutional block: stack everything */
  .inst-top { flex-direction: column; text-align: center; gap: 10px; padding: 12px 14px; }
  .inst-logo { height: 36px; width: auto; }
  .inst-uni { font-size: .78rem; }
  .inst-lab { font-size: .74rem; }
  .inst-project { font-size: .88rem; }

  .inst-body { flex-direction: column; align-items: center; padding: 14px; gap: 14px; }
  .inst-robot { width: 130px; }
  .inst-desc { font-size: .84rem; }

  /* Mode buttons: stack */
  .mode-grid { grid-template-columns: 1fr; gap: 10px; }
  .mode-icon { font-size: 1.5rem; }
  .mode-title { font-size: .9rem; }

  /* Type buttons: 2 columns on small, larger touch targets */
  .type-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .type-btn { padding: 14px 6px 12px; }
  .t-icon { font-size: 1.3rem; }
  .t-label { font-size: .76rem; }
  .t-pts { font-size: .68rem; }

  /* Answer inputs: bigger for touch */
  .answer-input { padding: 12px 14px; font-size: 1rem; }
  .answer-textarea { padding: 14px; font-size: 1rem; min-height: 180px; }

  /* Buttons: full width */
  .btn { width: 100%; justify-content: center; padding: 14px 20px; font-size: 1rem; }
  .kbd-toggle { font-size: .8rem; }
  .kbd-key { padding: 9px 10px; font-size: 1rem; min-width: 38px; }

  /* Evaluation */
  .eval-item { padding: 10px; font-size: .88rem; }
  .score-big { font-size: 1.7rem; }

  /* FAB: smaller */
  .fab-reset { bottom: 12px; right: 12px; padding: 9px 14px; font-size: .76rem; }

  /* Exam table */
  .exam-table th, .exam-table td { padding: 7px 8px; font-size: .82rem; }

  /* Cards */
  .card { padding: 14px; margin-top: 14px; }
  .app-wrap { padding: 0 10px 100px; }
}

/* Very small (320px) */
@media(max-width:360px){
  .type-grid { grid-template-columns: 1fr 1fr; gap: 6px; }
  .type-btn { padding: 12px 4px 10px; }
  .t-label { font-size: .72rem; }
  .mode-title { font-size: .85rem; }
  .inst-uni { font-size: .74rem; letter-spacing: .02em; }
}

/* ── Extra energy for youth UI ─────────────────────────────── */

/* Mode buttons — gradient + bigger */
.mode-btn {
  border-width: 2.5px;
  padding: 22px 14px;
}
.mode-btn:hover, .mode-btn.active {
  background: linear-gradient(135deg,#e0eeff,#f0f6ff) !important;
}
.mode-btn.exam-btn:hover, .mode-btn.exam-btn.active {
  background: linear-gradient(135deg,#e8ecf8,#eef0ff) !important;
}

/* Generate button — bigger, gradient */
.btn-primary {
  background: linear-gradient(135deg,#1a6ee8,#4a90ff) !important;
  box-shadow: 0 4px 16px rgba(26,110,232,.4);
  border-radius: 10px;
  letter-spacing: .02em;
}
.btn-primary:hover {
  background: linear-gradient(135deg,#1560d8,#3a80f8) !important;
  box-shadow: 0 6px 22px rgba(26,110,232,.5);
  transform: translateY(-2px);
}

/* Type buttons — slightly rounded and more shadow on hover */
.type-btn:hover, .type-btn.active {
  box-shadow: 0 8px 24px rgba(0,0,0,.22) !important;
}

/* Exercise box — left border more vivid */
.exercise-box { border-left-width: 5px; border-left-color: #1a6ee8; }

/* Score box — gradient */
.score-box { background: linear-gradient(135deg,#ddeeff,#eef6ff); border-color: #1a6ee8; }

/* FAB — more vivid */
.fab-reset { background: linear-gradient(135deg,#f0a500,#f8c030); color: #fff; opacity:.9; }
.fab-reset:hover { opacity:1; }

/* Progress fill — rainbow gradient */
.progress-fill { background: linear-gradient(90deg,#1a6ee8,#9b30f0,#ff3a80); }