/**
 * UI/UX Modernization - Component Library
 * LimitZero 스타일 적용
 * Version: 1.1 - CDN Tailwind 호환
 */

/* ============================================
   Button Styles
   ============================================ */

.btn-primary {
    background-color: #2563EB;
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    display: inline-block;
    text-align: center;
}

.btn-primary:hover {
    background-color: #1D4ED8;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transform: translateY(-0.125rem);
}

.btn-neon {
    background-color: #00E5A0;
    color: #111827;
    font-weight: 700;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
    box-shadow: 0 0 20px rgba(0, 229, 160, 0.4);
    display: inline-block;
    text-align: center;
}

.btn-neon:hover {
    background-color: #34D399;
    box-shadow: 0 0 30px rgba(0, 229, 160, 0.5);
    transform: translateY(-0.25rem);
}

.btn-secondary {
    background-color: white;
    color: #374151;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: 2px solid #D1D5DB;
    transition: all 0.2s;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    display: inline-block;
    text-align: center;
}

.btn-secondary:hover {
    background-color: #F9FAFB;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.btn-ghost {
    background-color: transparent;
    color: white;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.btn-ghost:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Card Styles
   ============================================ */

.card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    padding: 1.5rem;
    transition: all 0.3s;
}

.dark .card {
    background-color: #1a1b1f;
    border: 1px solid #2a2b2f;
}

.card:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transform: translateY(-0.25rem);
}

.card-featured {
    background: linear-gradient(135deg, #2563EB 0%, #4F6EF7 100%);
    color: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    padding: 2rem;
}

.card-interactive {
    cursor: pointer;
}

.card-bordered {
    border: 2px solid #E5E7EB;
}

.dark .card-bordered {
    border-color: #2a2b2f;
}

.card-bordered:hover {
    border-color: #2563EB;
}

.dark .card-bordered:hover {
    border-color: #3B82F6;
}

/* ============================================
   Badge Styles
   ============================================ */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-blue {
    background-color: #DBEAFE;
    color: #1E40AF;
}

.dark .badge-blue {
    background-color: rgba(30, 58, 138, 0.3);
    color: #93C5FD;
}

.badge-green {
    background-color: #D1FAE5;
    color: #065F46;
}

.dark .badge-green {
    background-color: rgba(6, 95, 70, 0.3);
    color: #6EE7B7;
}

.badge-yellow {
    background-color: #FEF3C7;
    color: #92400E;
}

.dark .badge-yellow {
    background-color: rgba(146, 64, 14, 0.3);
    color: #FCD34D;
}

.badge-red {
    background-color: #FEE2E2;
    color: #991B1B;
}

.dark .badge-red {
    background-color: rgba(153, 27, 27, 0.3);
    color: #FCA5A5;
}

.badge-purple {
    background-color: #EDE9FE;
    color: #5B21B6;
}

.dark .badge-purple {
    background-color: rgba(91, 33, 182, 0.3);
    color: #C4B5FD;
}

.badge-neon {
    background-color: rgba(0, 229, 160, 0.1);
    color: #00E5A0;
    border: 1px solid #00E5A0;
}

.dark .badge-neon {
    background-color: rgba(0, 229, 160, 0.2);
}

.badge-primary {
    background-color: rgba(37, 99, 235, 0.1);
    color: #2563EB;
    border: 1px solid #2563EB;
}

.dark .badge-primary {
    background-color: rgba(37, 99, 235, 0.2);
    color: #3B82F6;
}

/* ============================================
   Loading Spinner
   ============================================ */

.spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 4px solid #E5E7EB;
    border-top-color: #2563EB;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-sm {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

.spinner-lg {
    width: 2rem;
    height: 2rem;
    border-width: 4px;
}

.spinner-white {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: white;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   Progress Bar
   ============================================ */

.progress-bar {
    width: 100%;
    background-color: #E5E7EB;
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background-color: #2563EB;
    border-radius: 9999px;
    transition: all 0.5s;
}

.progress-bar-sm {
    height: 0.5rem;
}

.progress-bar-md {
    height: 1rem;
}

.progress-bar-lg {
    height: 1.5rem;
}

/* ============================================
   Input & Form Styles
   ============================================ */

.input-field {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #D1D5DB;
    border-radius: 0.5rem;
    transition: all 0.2s;
    background-color: white;
    color: #111827;
}

.dark .input-field {
    background-color: #1a1b1f;
    border-color: #2a2b2f;
    color: #e5e7eb;
}

.input-field:focus {
    outline: none;
    border-color: #2563EB;
    ring: 2px;
    ring-color: #2563EB;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.textarea-field {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #D1D5DB;
    border-radius: 0.5rem;
    resize: vertical;
    transition: all 0.2s;
    background-color: white;
    color: #111827;
}

.dark .textarea-field {
    background-color: #1a1b1f;
    border-color: #2a2b2f;
    color: #e5e7eb;
}

.textarea-field:focus {
    outline: none;
    border-color: #2563EB;
    ring: 2px;
    ring-color: #2563EB;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.dark .textarea-field:focus {
    border-color: #3B82F6;
}

.select-field {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #D1D5DB;
    border-radius: 0.5rem;
    transition: all 0.2s;
    background-color: white;
    color: #111827;
}

.dark .select-field {
    background-color: #1a1b1f;
    border-color: #2a2b2f;
    color: #e5e7eb;
}

/* ============================================
   Alert & Banner Styles
   ============================================ */

.alert {
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    border-left-width: 4px;
}

.alert-success {
    background-color: #ECFDF5;
    border-color: #10B981;
    color: #064E3B;
}

.alert-warning {
    background-color: #FFFBEB;
    border-color: #F59E0B;
    color: #78350F;
}

.alert-error {
    background-color: #FEF2F2;
    border-color: #EF4444;
    color: #7F1D1D;
}

.alert-info {
    background-color: #EFF6FF;
    border-color: #3B82F6;
    color: #1E3A8A;
}

/* ============================================
   Tab Styles
   ============================================ */

.tab {
    padding: 0.75rem 1rem;
    font-weight: 500;
    color: #6B7280;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.dark .tab {
    color: #9ca3af;
}

.tab:hover {
    color: #2563EB;
    border-bottom-color: #D1D5DB;
}

.dark .tab:hover {
    color: #3B82F6;
    border-bottom-color: #2a2b2f;
}

.tab.active {
    color: #2563EB;
    border-bottom-color: #2563EB;
}

.dark .tab.active {
    color: #3B82F6;
    border-bottom-color: #3B82F6;
}

.tab-content {
    padding: 1.5rem 0;
}

/* Scroll margin for smooth scroll to section */
.scroll-mt-24 {
    scroll-margin-top: 6rem;
}

/* Hide scrollbar for tab navigation (모바일 탭 스크롤) */
.scrollbar-hide {
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}

.scrollbar-hide::-webkit-scrollbar {
    display: none;  /* Chrome, Safari, Opera */
}

/* ============================================
   Animation on Scroll (Home Page)
   ============================================ */

/* 초기 상태: 투명하고 아래에 위치 */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 애니메이션 실행 상태 */
.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger 효과를 위한 딜레이 클래스 */
.delay-100 {
    transition-delay: 0.1s;
}

.delay-200 {
    transition-delay: 0.2s;
}

.delay-300 {
    transition-delay: 0.3s;
}

.delay-400 {
    transition-delay: 0.4s;
}

.delay-500 {
    transition-delay: 0.5s;
}

.delay-600 {
    transition-delay: 0.6s;
}

/* Hero 섹션 특별 애니메이션 */
.hero-title {
    opacity: 0;
    transform: translateY(50px) scale(0.95);
    transition: opacity 1s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.hero-title.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* 카드 stagger 애니메이션 */
.card-stagger {
    opacity: 0;
    transform: translateY(30px);
}

.card-stagger.is-visible {
    animation: fadeInUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}

/* 각 카드에 순차적 딜레이 */
.card-stagger:nth-child(1).is-visible {
    animation-delay: 0s;
}

.card-stagger:nth-child(2).is-visible {
    animation-delay: 0.1s;
}

.card-stagger:nth-child(3).is-visible {
    animation-delay: 0.2s;
}

.card-stagger:nth-child(4).is-visible {
    animation-delay: 0.3s;
}

.card-stagger:nth-child(5).is-visible {
    animation-delay: 0.4s;
}

.card-stagger:nth-child(6).is-visible {
    animation-delay: 0.5s;
}

/* ============================================
   Animation Utilities
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInFast {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInSlow {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromBottom {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}

.animate-fade-in-fast {
    animation: fadeInFast 0.3s ease-out;
}

.animate-fade-in-slow {
    animation: fadeInSlow 0.9s ease-out;
}

.animate-slide-in {
    animation: slideIn 0.4s ease-out;
}

.animate-slide-in-left {
    animation: slideInFromLeft 0.6s ease-out;
}

.animate-slide-in-right {
    animation: slideInFromRight 0.6s ease-out;
}

.animate-slide-in-bottom {
    animation: slideInFromBottom 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.4s ease-out;
}

.animate-fade-out {
    animation: fadeOut 0.3s ease-out;
}

/* ============================================
   Utility Classes
   ============================================ */

.text-gradient-primary {
    background: linear-gradient(90deg, #2563EB 0%, #4F6EF7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hero 섹션 전용 그라데이션 (블루-시안-민트) */
.hero-answer-gradient {
    background: linear-gradient(90deg, #1E40AF 0%, #2563EB 25%, #06B6D4 60%, #10B981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    font-weight: 900;
    letter-spacing: -0.04em;
}

/* ============================================
   Hero Background Layers (네이비 그라데이션)
   ============================================ */

/* Hero 섹션 메인 컨테이너 */
.hero-section-wrapper {
    position: relative;
    background: linear-gradient(180deg, #0a0e1a 0%, #111827 100%);
    border-radius: 1rem;
    overflow: hidden;
}

/* 다크 모드에서 더 어둡게 */
.dark .hero-section-wrapper {
    background: linear-gradient(180deg, #050810 0%, #0a0e1a 100%);
}

/* 레이어 1: 중앙 블루 glow (넓은 영역) */
.hero-bg-glow-primary {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 80% 60% at 50% 30%,
        rgba(59, 130, 246, 0.12) 0%,
        rgba(59, 130, 246, 0.06) 40%,
        transparent 70%
    );
    pointer-events: none;
}

/* 레이어 2: 상단 퍼플 accent */
.hero-bg-glow-accent {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 60% 40% at 50% 0%,
        rgba(139, 92, 246, 0.08) 0%,
        transparent 60%
    );
    pointer-events: none;
}

/* 레이어 3: 하단 subtle fade */
.hero-bg-fade-bottom {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        transparent 60%,
        rgba(6, 95, 70, 0.03) 100%
    );
    pointer-events: none;
}

/* 레이어 4: 중앙 집중 조명 효과 (강조) */
.hero-bg-spotlight {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        circle at 50% 40%,
        rgba(96, 165, 250, 0.08) 0%,
        transparent 50%
    );
    pointer-events: none;
}

/* 모바일에서 그라데이션 위치 조정 */
@media (max-width: 768px) {
    .hero-bg-glow-primary {
        background: radial-gradient(
            ellipse 100% 50% at 50% 20%,
            rgba(59, 130, 246, 0.15) 0%,
            rgba(59, 130, 246, 0.08) 40%,
            transparent 70%
        );
    }
}

.bg-gradient-hero {
    background: linear-gradient(135deg, #2563EB 0%, #4F6EF7 50%, #2563EB 100%);
}

.shadow-neon {
    box-shadow: 0 0 20px rgba(0, 229, 160, 0.4);
}

.shadow-neon-lg {
    box-shadow: 0 0 30px rgba(0, 229, 160, 0.5);
}

/* ============================================
   HTMX Utilities
   ============================================ */

.htmx-indicator {
    display: none;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
    display: block;
}

.htmx-request form {
    opacity: 0.6;
    pointer-events: none;
}

.htmx-swapping {
    opacity: 0;
    transition: opacity 200ms ease-out;
}

.htmx-settling {
    opacity: 1;
    transition: opacity 200ms ease-in;
}

/* ============================================
   Responsive Utilities
   ============================================ */

@media (max-width: 768px) {
    .card {
        padding: 1rem;
    }

    .btn-primary,
    .btn-secondary,
    .btn-neon {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .no-print {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid #D1D5DB;
    }
}