.premium-btn-modern{width: 100%;padding: 20px 24px;background: var(--surface-color);color: var(--main-text-color);border: 1px solid var(--border-color);border-left: 3px solid var(--accent-color);border-radius: var(--radius-lg);cursor: pointer;box-shadow: var(--shadow-sm);display: flex;align-items: center;justify-content: center;gap: 16px;transition: border-color .2s ease, background-color .2s ease;font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Yu Gothic UI', sans-serif;}.premium-btn-modern:hover{background: var(--light-accent-color);border-color: var(--accent-color);}.premium-btn-modern .btn-text{display: flex;flex-direction: column;align-items: flex-start;text-align: left;line-height: 1.6;gap: 2px;}.premium-btn-modern .btn-title{font-size: 1.0625rem;font-weight: 700;letter-spacing: .02em;}.premium-btn-modern .btn-sub{font-size: .8125rem;font-weight: 400;color: var(--text-muted);}