/* =========================================
   ITPM 미래포럼 설문 - 메인 스타일시트
   ========================================= */

:root {
  --primary:      #4f46e5;
  --primary-dark: #3730a3;
  --primary-light:#6366f1;
  --accent:       #0891b2;
  --accent2:      #059669;
  --gold:         #d97706;
  --bg-deep:      #f0f4ff;
  --bg-card:      #ffffff;
  --bg-card2:     #f8faff;
  --border:       rgba(99,102,241,.18);
  --text-main:    #1e293b;
  --text-sub:     #475569;
  --text-muted:   #94a3b8;
  --score-5:      #059669;
  --score-4:      #0891b2;
  --score-3:      #6366f1;
  --score-2:      #d97706;
  --score-1:      #dc2626;
  --radius-lg:    18px;
  --radius-md:    12px;
  --shadow-glow:  0 0 40px rgba(79,70,229,.15);
  --trans:        .25s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans KR', sans-serif;
  background: linear-gradient(135deg, #eef2ff 0%, #f0f9ff 50%, #f0fdf4 100%);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── 배경 파티클 ── */
.bg-particles {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}
.particle {
  position: absolute; border-radius: 50%;
  animation: floatUp linear infinite;
  opacity: .15;
}
@keyframes floatUp {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  10%  { opacity: .15; }
  90%  { opacity: .08; }
  100% { transform: translateY(-10vh) scale(1.2); opacity: 0; }
}

/* ── 헤더 ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(99,102,241,.08);
}
.header-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.header-logo { display: flex; align-items: center; gap: 12px; }
.logo-badge {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center;
  font-size: 20px; color: #fff;
  box-shadow: 0 4px 16px rgba(79,70,229,.5);
}
.logo-text { display: flex; flex-direction: column; }
.logo-title { font-size: 15px; font-weight: 700; color: var(--text-main); }
.logo-sub   { font-size: 11px; color: var(--primary-light); font-weight: 600; }

.header-nav { display: flex; gap: 8px; }
.nav-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 10px;
  font-size: 13px; font-weight: 500; text-decoration: none;
  color: var(--text-sub); border: 1px solid transparent;
  transition: var(--trans);
}
.nav-btn:hover, .nav-btn.active {
  background: rgba(99,102,241,.1);
  border-color: rgba(99,102,241,.3);
  color: var(--primary);
}

/* ── 히어로 ── */
.hero-section {
  position: relative; z-index: 1;
  background: linear-gradient(180deg, rgba(99,102,241,.08) 0%, rgba(14,165,233,.05) 60%, transparent 100%);
  border-bottom: 1px solid rgba(99,102,241,.12);
  padding: 72px 24px 60px;
  text-align: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(217,119,6,.08); border: 1px solid rgba(217,119,6,.3);
  color: var(--gold); font-size: 13px; font-weight: 600;
  padding: 6px 16px; border-radius: 999px; margin-bottom: 20px;
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(245,158,11,.3); } 50% { box-shadow: 0 0 0 8px rgba(245,158,11,0); } }

.hero-title {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800; line-height: 1.25;
  margin-bottom: 16px; letter-spacing: -0.02em;
}
.highlight {
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 16px; color: var(--text-sub); max-width: 540px;
  margin: 0 auto 28px; line-height: 1.7;
}
.hero-meta {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 20px;
}
.hero-meta span {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-muted);
}
.hero-meta i { color: var(--primary); }

/* ── 메인 레이아웃 ── */
.survey-main {
  position: relative; z-index: 1;
  max-width: 860px; margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ── 폼 섹션 ── */
.form-section {
  background: var(--bg-card);
  border: 1px solid rgba(99,102,241,.15);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 28px;
  box-shadow: 0 4px 24px rgba(99,102,241,.08), 0 1px 4px rgba(0,0,0,.04);
  transition: var(--trans);
}
.form-section:hover { border-color: rgba(99,102,241,.35); box-shadow: 0 8px 32px rgba(99,102,241,.13); }

.section-header {
  display: flex; align-items: flex-start; gap: 16px; margin-bottom: 24px;
}
.section-icon {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(14,165,233,.1));
  border: 1px solid rgba(99,102,241,.2);
  display: grid; place-items: center;
  font-size: 20px; color: var(--primary);
}
.section-title { font-size: 20px; font-weight: 700; margin-bottom: 4px; color: var(--text-main); }
.section-desc  { font-size: 13px; color: var(--text-sub); line-height: 1.5; }

/* ── 응답자 필드 ── */
.respondent-fields {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
@media (max-width: 540px) { .respondent-fields { grid-template-columns: 1fr; } }

.field-group { display: flex; flex-direction: column; gap: 8px; }
.field-group label {
  font-size: 13px; font-weight: 600; color: var(--text-sub);
  display: flex; align-items: center; gap: 6px;
}
.field-group label i { color: var(--primary); }
.field-group input {
  background: #f8faff; border: 1.5px solid rgba(99,102,241,.18);
  border-radius: var(--radius-md); padding: 12px 16px;
  color: var(--text-main); font-size: 14px; font-family: inherit;
  transition: var(--trans); outline: none;
}
.field-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.12);
  background: #fff;
}
.field-group input::placeholder { color: var(--text-muted); }

/* ── 평점 범례 ── */
.rating-legend {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px;
}
.legend-item {
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
  border: 1px solid;
}
.score-5 { background: rgba(5,150,105,.08);  border-color: rgba(5,150,105,.35);  color: var(--score-5); }
.score-4 { background: rgba(8,145,178,.08);  border-color: rgba(8,145,178,.35);  color: var(--score-4); }
.score-3 { background: rgba(99,102,241,.08); border-color: rgba(99,102,241,.35); color: var(--score-3); }
.score-2 { background: rgba(217,119,6,.08);  border-color: rgba(217,119,6,.35);  color: var(--score-2); }
.score-1 { background: rgba(220,38,38,.08);  border-color: rgba(220,38,38,.35);  color: var(--score-1); }

/* ── 질문 카드 ── */
.question-card {
  background: #fafbff;
  border: 1.5px solid rgba(99,102,241,.12);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin-bottom: 16px;
  transition: var(--trans);
  box-shadow: 0 1px 6px rgba(99,102,241,.06);
}
.question-card:hover { border-color: rgba(99,102,241,.3); box-shadow: 0 4px 16px rgba(99,102,241,.1); }
.question-card.answered { border-left: 3px solid var(--accent2); background: #f6fffe; }

.q-header {
  display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px;
}
.q-num {
  width: 32px; height: 32px; border-radius: 8px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700; color: #fff;
}
.q-text { font-size: 15px; font-weight: 600; line-height: 1.5; padding-top: 4px; }

/* ── 평점 선택 버튼 ── */
.rating-group {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px;
}
.rating-btn {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 10px 14px; border-radius: 10px; cursor: pointer;
  background: #fff; border: 1.5px solid rgba(99,102,241,.15);
  color: var(--text-sub); font-size: 12px; font-weight: 500;
  font-family: inherit; transition: var(--trans); min-width: 64px;
  user-select: none; box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.rating-btn .score-num { font-size: 18px; font-weight: 800; line-height: 1; }
.rating-btn:hover { background: rgba(99,102,241,.07); border-color: var(--primary); color: var(--primary); box-shadow: 0 2px 8px rgba(99,102,241,.15); }

.rating-btn[data-score="5"].selected { background: rgba(5,150,105,.1);  border-color: var(--score-5); color: var(--score-5); box-shadow: 0 2px 12px rgba(5,150,105,.18); }
.rating-btn[data-score="4"].selected { background: rgba(8,145,178,.1);  border-color: var(--score-4); color: var(--score-4); box-shadow: 0 2px 12px rgba(8,145,178,.18); }
.rating-btn[data-score="3"].selected { background: rgba(99,102,241,.1); border-color: var(--score-3); color: var(--score-3); box-shadow: 0 2px 12px rgba(99,102,241,.18); }
.rating-btn[data-score="2"].selected { background: rgba(217,119,6,.1);  border-color: var(--score-2); color: var(--score-2); box-shadow: 0 2px 12px rgba(217,119,6,.18); }
.rating-btn[data-score="1"].selected { background: rgba(220,38,38,.1);  border-color: var(--score-1); color: var(--score-1); box-shadow: 0 2px 12px rgba(220,38,38,.18); }

/* ── 건의사항 textarea ── */
.comment-field {
  width: 100%; background: #f8faff;
  border: 1.5px solid rgba(99,102,241,.15); border-radius: 10px;
  padding: 10px 14px; color: var(--text-main);
  font-size: 13px; font-family: inherit; resize: vertical;
  min-height: 60px; outline: none; transition: var(--trans);
}
.comment-field:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.1);
  background: #fff;
}
.comment-field::placeholder { color: var(--text-muted); }
.comment-label {
  font-size: 12px; color: var(--text-muted); margin-bottom: 6px;
  display: flex; align-items: center; gap: 4px;
}

/* 13번 건의사항 (텍스트만) */
.q13-only .comment-field { min-height: 90px; }

/* ── 제출 영역 ── */
.submit-area { text-align: center; padding-top: 8px; }
.submit-notice {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(99,102,241,.07); border: 1px solid rgba(99,102,241,.2);
  border-radius: 10px; padding: 10px 20px;
  font-size: 13px; color: var(--text-sub); margin-bottom: 24px;
}
.submit-notice i { color: var(--primary); }

.submit-btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border: none; border-radius: 14px;
  padding: 16px 48px; font-size: 17px; font-weight: 700;
  font-family: inherit; cursor: pointer; transition: var(--trans);
  box-shadow: 0 8px 32px rgba(79,70,229,.4);
  letter-spacing: .02em;
}
.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(79,70,229,.6);
}
.submit-btn:active { transform: translateY(0); }
.btn-shine {
  position: absolute; top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.25), transparent);
  transform: skewX(-20deg);
  animation: shine 3s ease-in-out infinite;
}
@keyframes shine { 0%,70%,100% { left: -100%; } 40% { left: 130%; } }

/* ── 에러 ── */
.question-card.error { border-color: var(--score-1); animation: shake .35s ease; }
@keyframes shake { 0%,100% { transform: translateX(0); } 25%,75% { transform: translateX(-4px); } 50% { transform: translateX(4px); } }
.error-msg { font-size: 12px; color: var(--score-1); margin-top: 6px; display: none; }
.question-card.error .error-msg { display: block; }

/* ── 성공 카드 ── */
.success-card {
  text-align: center; padding: 72px 32px;
  background: var(--bg-card); border: 1px solid rgba(99,102,241,.15);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 40px rgba(99,102,241,.12);
  animation: fadeIn .6s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.success-icon {
  width: 96px; height: 96px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(16,185,129,.2), rgba(6,182,212,.2));
  border: 2px solid var(--accent2);
  display: grid; place-items: center;
  font-size: 44px; color: var(--accent2);
  margin: 0 auto 28px;
  animation: popIn .5s cubic-bezier(.175,.885,.32,1.275);
}
@keyframes popIn { from { transform: scale(0); } to { transform: scale(1); } }

.success-card h2 { font-size: 26px; font-weight: 800; margin-bottom: 12px; color: var(--text-main); }
.success-card p  { color: var(--text-sub); line-height: 1.7; margin-bottom: 32px; }
.success-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px; font-size: 14px; font-weight: 600;
  background: #fff; border: 1.5px solid rgba(99,102,241,.2);
  color: var(--text-sub); cursor: pointer; font-family: inherit;
  text-decoration: none; transition: var(--trans);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(99,102,241,.05); }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 10px; font-size: 14px; font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; text-decoration: none; transition: var(--trans);
  box-shadow: 0 4px 16px rgba(79,70,229,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,70,229,.5); }

/* ── 푸터 ── */
.site-footer {
  position: relative; z-index: 1;
  text-align: center; padding: 24px;
  border-top: 1px solid rgba(99,102,241,.12);
  font-size: 12px; color: var(--text-muted);
  background: rgba(255,255,255,.6);
}

/* ── 스크롤바 ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f0f4ff; }
::-webkit-scrollbar-thumb { background: rgba(99,102,241,.25); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ── 반응형 ── */
@media (max-width: 640px) {
  .form-section { padding: 20px 16px; }
  .rating-btn { min-width: 52px; padding: 8px 10px; }
  .submit-btn { padding: 14px 32px; font-size: 15px; }
  .hero-section { padding: 48px 20px 40px; }
}