/* CrosswordPuzzle.io — Main Stylesheet */
/* ================================================================
   RESET & BASE
   ================================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;background:#f8f8f8;color:#1a1a1a;line-height:1.5;min-height:100vh;display:flex;flex-direction:column}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;background:none;border:none}
ul,ol{list-style:none}
img{max-width:100%;height:auto;display:block}

/* ================================================================
   LAYOUT
   ================================================================ */
.container{width:100%;max-width:900px;margin:0 auto;padding:0 20px}
main{flex:1;padding:24px 0 48px}

/* ================================================================
   HEADER
   ================================================================ */
.site-header{background:#fff;border-bottom:1px solid #e2e2e2;position:sticky;top:0;z-index:100;height:56px;display:flex;align-items:center}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.site-logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;letter-spacing:-0.3px;color:#1a1a1a}
.logo-icon{font-size:1.3rem;color:#1a1a1a;letter-spacing:-2px}
.logo-text{white-space:nowrap}
.site-nav{display:flex;align-items:center;gap:4px}
.nav-link{padding:6px 12px;border-radius:6px;font-size:0.875rem;font-weight:500;color:#444;transition:background 0.15s,color 0.15s}
.nav-link:hover,.nav-link:focus{background:#f0f0f0;color:#111}
.nav-link.active{color:#111;font-weight:700}
.btn-stats{font-size:0.875rem;font-weight:500;color:#444;padding:6px 12px;border-radius:6px;transition:background 0.15s}
.btn-stats:hover{background:#f0f0f0}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:6px;transition:background 0.15s}
.nav-toggle span{display:block;width:22px;height:2px;background:#1a1a1a;border-radius:2px;transition:0.25s}
.nav-toggle:hover{background:#f0f0f0}

/* ================================================================
   PUZZLE PAGE LAYOUT
   ================================================================ */
.puzzle-header{text-align:center;margin-bottom:20px}
.puzzle-title{font-size:1.4rem;font-weight:800;letter-spacing:-0.5px;margin-bottom:2px}
.puzzle-date{font-size:0.875rem;color:#666;margin-bottom:6px}
.puzzle-meta{display:flex;align-items:center;justify-content:center;gap:12px;font-size:0.8rem;color:#888}
.difficulty-badge{padding:2px 8px;border-radius:20px;font-weight:600;font-size:0.72rem;text-transform:uppercase;letter-spacing:0.4px}
.difficulty-badge.easy{background:#e8f5e9;color:#2e7d32}
.difficulty-badge.medium{background:#fff8e1;color:#f57f17}
.difficulty-badge.hard{background:#fce4ec;color:#b71c1c}
.timer-display{font-variant-numeric:tabular-nums;font-weight:600;font-size:0.9rem}
#timerPaused{font-size:0.7rem;color:#999}

.puzzle-layout{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:start}

/* ================================================================
   CROSSWORD GRID
   ================================================================ */
.grid-wrapper{display:flex;flex-direction:column;align-items:center;gap:14px}
.crossword-grid{display:grid;gap:2px;background:#1a1a1a;border:2px solid #1a1a1a;border-radius:4px;overflow:hidden;touch-action:none;user-select:none}
.cw-cell{position:relative;background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background 0.1s}
.cw-cell.black{background:#1a1a1a;cursor:default;pointer-events:none}
.cw-cell.selected{background:#ffd740}
.cw-cell.highlighted{background:#fff9c4}
.cw-cell.correct{background:#e8f5e9}
.cw-cell.incorrect{background:#ffebee}
.cw-cell.revealed{background:#e3f2fd}
.cw-cell-number{position:absolute;top:2px;left:3px;font-size:0.5rem;font-weight:700;line-height:1;color:#1a1a1a;pointer-events:none}
.cw-cell-letter{font-size:1.3rem;font-weight:700;text-transform:uppercase;line-height:1;pointer-events:none;color:#1a1a1a}
.cw-cell.incorrect .cw-cell-letter{color:#c62828}
.cw-cell.revealed .cw-cell-letter{color:#1565c0}
/* Hidden input for mobile keyboard */
#cwHiddenInput{position:fixed;left:-9999px;top:-9999px;opacity:0;width:1px;height:1px}

/* ================================================================
   PUZZLE CONTROLS
   ================================================================ */
.puzzle-controls{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.ctrl-group{display:flex;gap:6px;align-items:center}
.ctrl-btn{padding:8px 14px;border-radius:8px;font-size:0.82rem;font-weight:600;border:1.5px solid #ddd;background:#fff;color:#333;transition:0.15s;white-space:nowrap}
.ctrl-btn:hover,.ctrl-btn:focus{border-color:#1a1a1a;background:#f5f5f5}
.ctrl-btn.primary{background:#1a1a1a;color:#fff;border-color:#1a1a1a}
.ctrl-btn.primary:hover{background:#333}
.ctrl-btn.danger{border-color:#e53935;color:#c62828}
.ctrl-btn.danger:hover{background:#ffebee}
.ctrl-btn.reveal{border-color:#1565c0;color:#1565c0}
.ctrl-btn.reveal:hover{background:#e3f2fd}
.sep{width:1px;height:20px;background:#e0e0e0}

/* ================================================================
   CLUES PANEL
   ================================================================ */
.clues-panel{min-width:0}
.clues-section{margin-bottom:20px}
.clues-heading{font-size:0.72rem;font-weight:800;letter-spacing:1px;text-transform:uppercase;color:#888;margin-bottom:8px;padding-bottom:6px;border-bottom:1px solid #eee}
.clue-list{display:flex;flex-direction:column;gap:2px}
.clue-item{display:flex;gap:8px;padding:7px 8px;border-radius:6px;font-size:0.88rem;cursor:pointer;transition:background 0.1s;line-height:1.4}
.clue-item:hover{background:#f5f5f5}
.clue-item.active{background:#fff9c4;font-weight:600}
.clue-item.completed{color:#aaa}
.clue-num{font-weight:700;min-width:22px;color:#555;font-variant-numeric:tabular-nums;font-size:0.8rem;padding-top:1px}
.clue-text{flex:1}

/* ================================================================
   MODALS
   ================================================================ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.45);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}
.modal-overlay[hidden]{display:none}
body.modal-open{overflow:hidden}
.modal-box{background:#fff;border-radius:14px;padding:32px 28px;max-width:460px;width:100%;position:relative;box-shadow:0 20px 60px rgba(0,0,0,0.2)}
.modal-close{position:absolute;top:14px;right:16px;font-size:1.5rem;color:#888;line-height:1;padding:4px 8px;border-radius:6px;transition:0.15s}
.modal-close:hover{background:#f0f0f0;color:#333}
.modal-title{font-size:1.4rem;font-weight:800;margin-bottom:16px;text-align:center}

/* Completion modal */
.completion-modal .congrats{font-size:1.8rem;margin-bottom:4px;text-align:center}
.completion-modal .completion-time{font-size:2.4rem;font-weight:800;text-align:center;letter-spacing:-1px;margin-bottom:4px}
.completion-modal .completion-label{text-align:center;color:#666;font-size:0.875rem;margin-bottom:20px}
.completion-modal .share-grid{font-family:monospace;font-size:1.4rem;text-align:center;letter-spacing:2px;line-height:1.6;margin:12px 0;padding:12px;background:#f8f8f8;border-radius:8px}
.completion-modal .share-text-block{background:#f8f8f8;border-radius:8px;padding:12px;font-size:0.82rem;white-space:pre-wrap;font-family:monospace;color:#333;margin-bottom:16px;max-height:140px;overflow-y:auto}
.completion-modal .modal-actions{display:flex;gap:10px;justify-content:center}
.completion-modal .btn-share{background:#1a1a1a;color:#fff;padding:10px 24px;border-radius:8px;font-weight:700;font-size:0.9rem;transition:0.15s}
.completion-modal .btn-share:hover{background:#333}
.completion-modal .btn-archive{border:1.5px solid #ddd;padding:10px 20px;border-radius:8px;font-weight:600;font-size:0.9rem;color:#333;transition:0.15s}
.completion-modal .btn-archive:hover{background:#f5f5f5}

/* Confirm modal */
.confirm-modal .confirm-msg{text-align:center;color:#444;margin-bottom:20px}
.confirm-modal .confirm-actions{display:flex;gap:10px;justify-content:center}
.confirm-modal .btn-confirm{background:#1565c0;color:#fff;padding:9px 22px;border-radius:8px;font-weight:700}
.confirm-modal .btn-cancel{border:1.5px solid #ddd;padding:9px 18px;border-radius:8px;font-weight:600;color:#333}

/* Stats modal */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:4px}
.stat-cell{text-align:center;padding:12px 8px;background:#f8f8f8;border-radius:10px}
.stat-num{display:block;font-size:1.6rem;font-weight:800;letter-spacing:-0.5px}
.stat-label{font-size:0.72rem;color:#888;font-weight:500;text-transform:uppercase;letter-spacing:0.5px}

/* ================================================================
   ARCHIVE PAGE
   ================================================================ */
.page-title{font-size:1.6rem;font-weight:800;margin-bottom:4px}
.page-subtitle{color:#666;font-size:0.9rem;margin-bottom:28px}
.archive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-bottom:32px}
.archive-card{background:#fff;border:1px solid #e8e8e8;border-radius:10px;padding:16px;transition:box-shadow 0.15s,border-color 0.15s;display:block}
.archive-card:hover{border-color:#ccc;box-shadow:0 2px 12px rgba(0,0,0,0.07)}
.archive-card-date{font-size:0.78rem;color:#888;margin-bottom:4px}
.archive-card-title{font-weight:700;font-size:0.95rem;margin-bottom:8px;color:#111}
.archive-card-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.archive-card-solved{font-size:0.75rem;color:#2e7d32;font-weight:600;display:flex;align-items:center;gap:4px}
.archive-card-solved::before{content:'✓';font-weight:900}
.pagination{display:flex;gap:6px;justify-content:center;flex-wrap:wrap}
.page-btn{padding:7px 13px;border-radius:7px;border:1.5px solid #e0e0e0;font-weight:600;font-size:0.875rem;background:#fff;color:#444;transition:0.15s}
.page-btn:hover{border-color:#1a1a1a;background:#f5f5f5}
.page-btn.active{background:#1a1a1a;color:#fff;border-color:#1a1a1a}

/* ================================================================
   HOW TO PLAY
   ================================================================ */
.how-section{margin-bottom:32px}
.how-section h2{font-size:1.1rem;font-weight:800;margin-bottom:12px}
.how-list li{padding:6px 0 6px 24px;position:relative;font-size:0.9rem;color:#333;border-bottom:1px solid #f0f0f0}
.how-list li::before{content:'→';position:absolute;left:0;color:#888}
.key-grid{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.key-item{display:flex;align-items:center;gap:8px;font-size:0.875rem}
.kbd{display:inline-flex;align-items:center;justify-content:center;background:#f5f5f5;border:1px solid #ccc;border-bottom:2px solid #bbb;border-radius:5px;padding:3px 8px;font-size:0.78rem;font-family:monospace;font-weight:700;min-width:28px;white-space:nowrap}

/* ================================================================
   NO PUZZLE STATE
   ================================================================ */
.no-puzzle{text-align:center;padding:64px 20px}
.no-puzzle-icon{font-size:3rem;margin-bottom:16px}
.no-puzzle h2{font-size:1.3rem;font-weight:700;margin-bottom:8px}
.no-puzzle p{color:#666;margin-bottom:20px}
.btn-primary{display:inline-block;background:#1a1a1a;color:#fff;padding:10px 24px;border-radius:8px;font-weight:700;transition:0.15s}
.btn-primary:hover{background:#333}

/* ================================================================
   UTILITY
   ================================================================ */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.text-center{text-align:center}
.mt-4{margin-top:1rem}
.flash-msg{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:0.875rem}
.flash-msg.success{background:#e8f5e9;color:#2e7d32;border:1px solid #c8e6c9}
.flash-msg.error{background:#ffebee;color:#c62828;border:1px solid #ffcdd2}

/* ================================================================
   FOOTER
   ================================================================ */
.site-footer{background:#fff;border-top:1px solid #e2e2e2;padding:24px 0;margin-top:auto}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.footer-brand{font-weight:700;font-size:0.9rem}
.footer-nav{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
.footer-nav a{font-size:0.82rem;color:#888;transition:color 0.15s}
.footer-nav a:hover{color:#333}
.footer-copy{font-size:0.75rem;color:#bbb}

/* ================================================================
   RESPONSIVE — TABLET
   ================================================================ */
@media(max-width:768px){
  .nav-toggle{display:flex}
  .site-nav{
    display:none;position:absolute;top:56px;left:0;right:0;
    background:#fff;border-bottom:1px solid #e2e2e2;
    flex-direction:column;align-items:stretch;gap:0;padding:8px 12px 12px;
    box-shadow:0 4px 16px rgba(0,0,0,0.08)
  }
  .site-nav.open{display:flex}
  .nav-link{padding:10px 12px;border-radius:8px;font-size:1rem}
  .site-header{position:relative}

  .puzzle-layout{grid-template-columns:1fr;gap:20px}
  .grid-wrapper{order:0}
  .clues-panel{order:1}
}

@media(max-width:480px){
  .puzzle-controls{gap:6px}
  .ctrl-btn{padding:7px 10px;font-size:0.78rem}
  .modal-box{padding:24px 18px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .archive-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:360px){
  .archive-grid{grid-template-columns:1fr}
}