@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    --main-color-1: #0066B3;
    --main-color-2: #00B6AD;
    --text-dark: #1e293b;
    --particle-color: rgba(0, 102, 179, 0.5);
}

.text-slate-100{
	color : #000
}

* {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
}

.code-font {
    font-family: 'JetBrains Mono', monospace;
}

body {
    background-color: #ffffff;
}

/* 배너는 흰 배경 유지 */
nav {
    background-color: #ffffff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* 섹션 배경 */
.section-home {
    background: linear-gradient(135deg, #E5F9FD 0%, #D0F7F5 100%);
}
.section-research {
    background: linear-gradient(135deg, #E5FAFB 0%, #C5F5F3 100%);
}
.section-projects {
    background: linear-gradient(135deg, #F9FAE5 0%, #F7F3C5 100%);
}
.section-team {
    background: linear-gradient(135deg, #F9E5F5 0%, #F3C5E7 100%);
}
.section-contact {
    background: linear-gradient(135deg, #EAE7FB 0%, #DCD3F9 100%);
}

/* 공통 */
.glass-effect {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.floating-animation {
    animation: floating 5s ease-in-out infinite;
}

.pulse-glow {
    animation: pulse-glow 2s ease-in-out infinite alternate;
}

.fade-in-up, .slide-in-left, .slide-in-right, .scale-in {
    opacity: 0;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.fade-in-up { transform: translateY(40px); }
.slide-in-left { transform: translateX(-80px); }
.slide-in-right { transform: translateX(80px); }
.scale-in { transform: scale(0.9); }

.fade-in-up.animate,
.slide-in-left.animate,
.slide-in-right.animate,
.scale-in.animate {
    opacity: 1;
    transform: none;
}

@keyframes floating {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 15px rgba(0, 182, 173, 0.4);
    }
    100% {
        box-shadow: 0 0 30px rgba(0, 102, 179, 0.8), 0 0 50px rgba(0, 182, 173, 0.3);
    }
}

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* 텍스트 그라데이션 */
.text-gradient {
    background: linear-gradient(135deg, var(--main-color-1), var(--main-color-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 타이핑 애니메이션 */
.typing-animation {
    overflow: hidden;
    border-right: 3px solid var(--main-color-1);
    white-space: nowrap;
    animation: typing 4s steps(30, end), blink-caret 0.8s step-end infinite;
}
@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}
@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--main-color-1); }
}

/* 입자 효과 */
.particle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
    animation: particle-float 12s infinite;
}
@keyframes particle-float {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0.5; }
    25% { transform: translateY(-40px) translateX(20px); opacity: 0.7; }
    50% { transform: translateY(-80px) translateX(-20px); opacity: 0.3; }
    75% { transform: translateY(-40px) translateX(-40px); opacity: 0.7; }
}

/* 연구 카드 */
.research-card {
    background: linear-gradient(145deg, rgba(224, 255, 253, 0.8), rgba(204, 251, 248, 0.6));
    border: 1px solid rgba(0, 182, 173, 0.2);
    transition: all 0.3s ease;
}
.research-card:hover {
    border-color: rgba(0, 182, 173, 0.5);
    background: linear-gradient(145deg, rgba(0, 182, 173, 0.9), rgba(0, 102, 179, 0.7));
}

/* 배경 패턴 */
.matrix-bg {
    background-image:
        radial-gradient(circle at 25% 25%, rgba(0, 102, 179, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(0, 182, 173, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 75% 25%, rgba(0, 102, 179, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 25% 75%, rgba(0, 182, 173, 0.08) 0%, transparent 50%);
}