/* ========================================
   Shared Button Styles
   Base button system + color variants
   ======================================== */

/* ----- btn-style-1: 헤더 버튼 (학생모드, 선생님, 로그아웃) ----- */
.btn-style-1 {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 4px;
    border: 1px solid var(--cyan-30);
    background: linear-gradient(135deg, var(--cyan-10) 0%, var(--cyan-05) 100%);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
}

.btn-style-1:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--cyan-20);
}

/* btn-style-1 변형: 시안 강조 */
.btn-style-1.accent-cyan {
    background: linear-gradient(135deg, var(--cyan-15) 0%, var(--cyan-08) 100%);
    border-color: var(--cyan-40);
    color: var(--neon-cyan);
}

.btn-style-1.accent-cyan:hover {
    background: linear-gradient(135deg, var(--cyan-25) 0%, var(--cyan-15) 100%);
    box-shadow: 0 0 15px var(--cyan-30);
}

/* btn-style-1 변형: 핑크 강조 */
.btn-style-1.accent-pink {
    background: linear-gradient(135deg, var(--pink-15) 0%, var(--pink-08) 100%);
    border-color: var(--pink-40);
    color: var(--neon-pink);
}

.btn-style-1.accent-pink:hover {
    background: linear-gradient(135deg, var(--pink-25) 0%, var(--pink-15) 100%);
    box-shadow: 0 0 15px var(--pink-30);
}

/* btn-style-1 변형: 로그아웃 (빨강) */
.btn-style-1.accent-danger {
    border-color: var(--red-30);
    color: var(--red-80);
    background: linear-gradient(135deg, var(--red-10) 0%, var(--red-05) 100%);
}

.btn-style-1.accent-danger:hover {
    border-color: var(--error);
    color: var(--error);
    box-shadow: 0 0 10px var(--red-20);
}

/* ----- btn-style-2: 액션 버튼 (클래스 추가, 학생 추가) ----- */
.btn-style-2 {
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid var(--neon-cyan);
    background: transparent;
    color: var(--neon-cyan);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-style-2:hover {
    background: var(--neon-cyan);
    color: var(--bg-primary);
}

/* ----- btn-primary: 주요 액션 버튼 ----- */
.btn-primary {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--cyan-20) 0%, var(--cyan-10) 100%);
    border: 1px solid var(--neon-cyan);
    border-radius: 4px;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--neon-cyan);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 3px;
    position: relative;
    overflow: hidden;
}

.btn-primary:disabled,
.btn-primary.btn-disabled {
    background: rgba(107, 114, 128, 0.2);
    border-color: var(--text-muted);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary:disabled::before,
.btn-primary.btn-disabled::before {
    display: none;
}

.btn-primary:disabled:hover,
.btn-primary.btn-disabled:hover {
    background: rgba(107, 114, 128, 0.2);
    transform: none;
    box-shadow: none;
}

/* ----- btn-secondary: 보조 버튼 ----- */
.btn-secondary {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--text-muted);
    border-radius: 4px;
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.btn-secondary:hover {
    border-color: var(--neon-pink);
    color: var(--neon-pink);
    box-shadow: var(--glow-pink);
}

/* ----- btn-icon: 아이콘 버튼 ----- */
.btn-icon {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    opacity: 0.7;
    transition: all 0.3s ease;
}

.btn-icon:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* ----- btn-success: 성공/확인 버튼 ----- */
.btn-success {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--green-20) 0%, var(--green-10) 100%);
    border: 1px solid var(--success);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--success);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-success:hover {
    background: linear-gradient(135deg, var(--green-30) 0%, var(--green-20) 100%);
    box-shadow: var(--glow-green);
}

/* ----- btn-danger: 삭제/위험 버튼 ----- */
.btn-danger {
    padding: 8px 16px;
    border-radius: 4px;
    border: 1px solid var(--error);
    background: transparent;
    color: var(--error);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-danger:hover {
    background: var(--error);
    color: #fff;
}