.problems-section{
  max-width:1100px;
  margin:auto;
  padding:20px;
}


.problems-header{
  display:flex;
  flex-direction:column;
  gap:14px;
}


.problems-header h1{
  font-size:26px;
}


/* Controls */

.controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.controls input {
  background: #0b1120;
  border: 1px solid #1f2937;
  color: #e2e8f0;
  padding: 9px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
  appearance: none;
  -webkit-appearance: none;
}

.controls input {
  width: 260px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 12px center;
  padding-left: 36px;
}

.controls input::placeholder {
  color: #4b5563;
}

.controls input:focus {
  border-color: #3b82f6;
  background-color: #0f172a;
}

.custom-select { position: relative; width: 175px; user-select: none; }

.cs-selected {
  display: flex; align-items: center; justify-content: space-between;
  background: #0b1120; border: 1px solid #1f2937; color: #e2e8f0;
  padding: 9px 14px; border-radius: 8px; font-size: 13.5px;
  cursor: pointer; transition: border-color 0.15s, background 0.15s; gap: 8px;
}
.cs-selected:hover { border-color: #374151; background: #0f172a; }
.cs-left { display: flex; align-items: center; gap: 8px; }
.cs-dot { width: 8px; height: 8px; border-radius: 50%; background: #4b5563; flex-shrink: 0; transition: background 0.2s; }
.cs-dot.easy { background: #22c55e; }
.cs-dot.medium { background: #f59e0b; }
.cs-dot.hard { background: #ef4444; }
.cs-dot.challenging { background: #a855f7; }
.cs-arrow { color: #4b5563; transition: transform 0.2s; flex-shrink: 0; }

.custom-select.open .cs-selected { border-color: #3b82f6; background: #0f172a; }
.custom-select.open .cs-arrow { transform: rotate(180deg); }

.cs-options {
  display: none; position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: #0c1525; border: 1px solid #1f2937; border-radius: 10px;
  overflow: hidden; z-index: 100; box-shadow: 0 12px 32px rgba(0,0,0,0.5);
}
.custom-select.open .cs-options { display: block; }

.cs-header { padding: 6px 14px 4px; font-size: 11px; color: #374151; letter-spacing: 0.08em; text-transform: uppercase; }
.cs-divider { height: 1px; background: #1f2937; margin: 4px 0; }

.cs-option {
  padding: 9px 14px; font-size: 13px; cursor: pointer;
  transition: background 0.1s; display: flex; align-items: center; gap: 10px;
}
.cs-option:hover { background: #131f35; }
.cs-option.active { background: #131f35; }
.cs-option .opt-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.cs-option .opt-label { color: #9ca3af; }
.cs-option.active .opt-label { color: #e2e8f0; }
.cs-option .opt-check { margin-left: auto; opacity: 0; }
.cs-option.active .opt-check { opacity: 1; }

.opt-all .opt-dot { background: #4b5563; }
.opt-easy .opt-dot { background: #22c55e; }
.opt-easy:hover .opt-label, .opt-easy.active .opt-label { color: #22c55e; }
.opt-medium .opt-dot { background: #f59e0b; }
.opt-medium:hover .opt-label, .opt-medium.active .opt-label { color: #f59e0b; }
.opt-hard .opt-dot { background: #ef4444; }
.opt-hard:hover .opt-label, .opt-hard.active .opt-label { color: #ef4444; }
.opt-challenging .opt-dot { background: #a855f7; }
.opt-challenging:hover .opt-label, .opt-challenging.active .opt-label { color: #a855f7; }

/* Controls */


/* 
.controls{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.controls input, .controls select{
  background:#0f172a;
  border:1px solid #1f2937;
  color:#e5e7eb;
  padding:10px;
  border-radius:10px;
} */

.problems-wrapper{
  margin-top:20px;
  border-radius:12px;
  overflow:hidden;

  background: #0f172a;
  border: 1px solid rgba(255,255,255,0.05);
}




/* Problem Row */

.problem-row {
  display: grid;
  grid-template-columns: 60px 1fr 140px 110px;
  padding: 13px 20px;
  border-bottom: 1px solid #1f2937;
  align-items: center;
  cursor: pointer;
  transition: background 0.15s ease;
}

.problem-row:hover {
  background: #0f172a;
}

.problem-row.header {
  background: rgba(255, 255, 255, 0.04);
  font-weight: 600;
  cursor: default;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #6b7280;
}

.problem-row.header:hover {
  background: rgba(255, 255, 255, 0.04);
}

/* ID column */
.col-id {
  font-size: 13px;
  color: #4b5563;
  font-weight: 500;
}

/* Title column */
.col-title {
  font-size: 14px;
  color: #e2e8f0;
  font-weight: 500;
}

.problem-row:hover .col-title {
  color: #ffffff;
}

/* Difficulty badge */
.difficulty-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: capitalize;
  letter-spacing: 0.02em;
}

.difficulty-badge.easy    { background: rgba(34,197,94,0.12);  color: #22c55e; }
.difficulty-badge.medium  { background: rgba(245,158,11,0.12); color: #f59e0b; }
.difficulty-badge.hard    { background: rgba(239,68,68,0.12);  color: #ef4444; }
.difficulty-badge.challenging { background: rgba(168,85,247,0.12); color: #a855f7; }

/* Status badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}

.status-badge.solved {
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
}

.status-badge.unsolved {
  color: #374151;
  padding: 0;
}

/* Problem Row */










/* 
.problem-row{
  display:grid;
  grid-template-columns:80px 1fr 150px 100px;
  padding:12px 14px;
  border-bottom:1px solid #1f2937;
  align-items:center;
  cursor:pointer;
  transition:0.2s;
}

.problem-row:hover{
  background:#0f172a;
}

.problem-row.header{
  background: rgba(255,255,255,0.05);
  font-weight:600;
  cursor:default;
}

.problem-row.header:hover{
  
}

.difficulty{
  text-transform:capitalize;
}

.easy{color:#22c55e}
.medium{color:#f59e0b}
.hard{color:#ef4444}
.challenging{color:#a855f7}

.status{
  font-size:13px;
}

.solved{
  color:#22c55e;
  font-weight:500;
} */



/* Create Problem Button */

.create-problem-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center; /* center content */

    width: 170px;   /* FIXED WIDTH */
    height: 45px;   /* FIXED HEIGHT */

    gap: 8px;

    border-radius: 10px;
    background: linear-gradient(135deg, #6a5cff, #8f6bff);
    color: #fff;

    font-weight: 500;
    font-size: 14px;

    border: none;
    cursor: pointer;

    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}


.create-problem-btn .icon {
    font-size: 18px;
    transition: transform 0.3s ease;
}


.create-problem-btn:hover {
    transform: translateY(-2px);
}


.create-problem-btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;

    background: linear-gradient(
        120deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );

    transition: all 0.5s ease;
}

.create-problem-btn:hover::before {
    left: 100%;
}


.create-problem-btn:hover .icon {
    transform: rotate(90deg) scale(1.2);
}

/* Create Problem Button */





@media (max-width: 768px) {
 
  .problem-row {
    grid-template-columns: 40px 1fr 100px 80px;
    padding: 11px 14px;
    align-items: start;
  }

  .col-title {
    font-size: 13px;
    white-space: normal;
    word-break: break-word;
    line-height: 1.4;
  }

  .difficulty-badge,
  .status-badge {
    font-size: 11px;
    padding: 2px 8px;
  }

.col-difficulty,
.col-status {
  display: flex;
  justify-content: center;
  align-items: center;
}

}