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1rem}.admin-grid{grid-template-columns:1fr}.course-block-header{flex-direction:column;align-items:flex-start;gap:.5rem}.lessons-section-header{flex-direction:column;align-items:flex-start;gap:.75rem}.lesson-block-header{flex-direction:column;align-items:flex-start;gap:.5rem}.lesson-header-left,.course-header-left{flex-wrap:wrap}.item-row{flex-direction:column;align-items:stretch}.duration-input{max-width:none!important}.src-input{min-width:0}.add-item-row{flex-wrap:wrap}.admin-gate{margin:2rem 1rem;padding:2rem 1.5rem}}:root{--primary: #c48b81;--primary-hover: #e09f92;--bg-dark: #fdfaf9;--bg-card: #ffffff;--text-main: #444140;--text-muted: #a09795;--border: #f9f1f0;--accent: #fabeae;--font-body: "Noto Sans JP", "Outfit", sans-serif;--font-heading: "Cinzel", "Noto Serif JP", serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background-color:var(--bg-dark);color:var(--text-main);line-height:1.8;-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:#2b2725;letter-spacing:.05em;margin-bottom:.5rem}.app-container{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1;display:flex;flex-direction:column}button{cursor:pointer;border:none;background:none;font-family:inherit}a{color:inherit;text-decoration:none}.app-header{padding:1rem 2rem;background-color:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(250,190,174,.4);box-shadow:0 4px 20px #00000008;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:100}.app-header-title{font-family:var(--font-heading);cursor:pointer;font-size:1.6rem;margin-bottom:0}.app-header-title-studio{color:var(--primary);font-family:var(--font-heading)}.app-header-actions{display:flex;align-items:center;gap:1rem}.app-header-top-btn{display:flex;align-items:center;padding:.4rem 1rem;border-radius:30px;border:1px solid var(--border);background-color:var(--bg-dark);color:var(--text-main);font-size:.85rem;font-weight:500;text-decoration:none;transition:all .3s ease}.app-header-top-btn:hover{background:linear-gradient(135deg,var(--accent) 0%,var(--primary-hover) 100%);color:#fff;border-color:transparent;transform:translateY(-2px);box-shadow:0 4px 10px #fabeae4d}.app-header-select{padding:.4rem .8rem;background-color:var(--bg-dark);color:var(--text-main);border:1px solid var(--border);border-radius:4px;outline:none;cursor:pointer}.app-header-logout{display:flex;align-items:center;gap:.4rem;padding:.5rem 1.2rem;border-radius:30px;background:linear-gradient(135deg,var(--accent) 0%,var(--primary-hover) 100%);color:#fff;border:none;font-weight:500;font-size:.85rem;transition:all .3s ease;box-shadow:0 4px 10px #fabeae4d;cursor:pointer}.app-header-logout:hover{transform:translateY(-2px);box-shadow:0 6px 15px #fabeae80;color:#fff}@media (max-width: 768px){.app-header{padding:1rem}.app-header-title{font-size:1.1rem}}