:root {
    --bg-page: #0b0f19;
    --bg-card: rgba(17, 24, 39, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #10b981;
    --accent-glow: rgba(16, 185, 129, 0.2);
    --danger: #f87171;
    --font-sans: 'Outfit', 'Noto Sans KR', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-page);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1rem;
    overflow-x: hidden;
    position: relative;
    width: 100%;
    box-sizing: border-box;
}

/* 배경 장식 원 래퍼 (가로 스크롤 및 레이아웃 밀림 방지) */
.bg-glow-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.bg-glow-1 {
    position: absolute;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(0,0,0,0) 70%);
    top: -100px;
    left: -100px;
}

.bg-glow-2 {
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, rgba(0,0,0,0) 70%);
    bottom: -150px;
    right: -100px;
}

.login-container {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    z-index: 10;
    box-sizing: border-box;
}

.logo-section {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    font-size: 1.75rem;
    font-weight: 800;
    border-radius: 12px;
    box-shadow: 0 0 20px var(--accent-glow);
    margin-bottom: 0.75rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-text span {
    color: var(--accent);
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.25rem 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.form-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-wrapper {
    position: relative;
    width: 100%;
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.5);
    color: var(--text-primary);
    outline: none;
    font-size: 0.95rem;
    font-family: var(--font-sans);
    transition: all 0.25s ease;
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    background: rgba(15, 23, 42, 0.8);
}

.form-control-pass {
    padding-right: 2.75rem;
}

.toggle-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    outline: none;
    box-shadow: none;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    padding: 0;
    transition: color 0.2s ease;
}

.toggle-btn:hover {
    color: var(--text-primary);
}

.btn-submit {
    width: 100%;
    padding: 0.85rem;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 0.5rem;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

.btn-submit:active {
    transform: translateY(1px);
}

.error-message {
    color: var(--danger);
    font-size: 0.85rem;
    text-align: center;
    display: none;
    margin-bottom: 1rem;
    line-height: 1.4;
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.2);
    padding: 0.5rem;
    border-radius: 6px;
}